If you notice once you hook up to test the battery the second time (after the jump) its steadily dropping in voltage...... The battery has a bad cell in it. Ive jumped several different types and size batteries in the last few years, and over time, I've discovered that no matter the type or size, if it has a bad cell, (or cells) it will continue to drain. Thus that battery will continue to drain over time faster than a battery that doesn't have a bad cell. There are ways to replace individual cells but that is not as easy for just anyone to do. Excellent vid though, and hope that info helps.
@@scottschmittmusic thats what I'm wondering, he says at 1:50 "the voltage matters", but I was thinking as long as its the same type of battery it should work, and I'm just making what I thought was a somewhat educated guess. LOL
@scottschmittmusic No you need at least the same voltage (but also not too much higher) less will not charge it. Although if you put two 12V batteries in series, then you'd be in business.
Worked like a charm. Thank you. Got a Black and Decker for Christmas that wouldn't charge out the box. Did this with a fully charged Worx battery and now it's charging. 🤘🏾
Worked for me! Left the battery uncharged in the basement for 5 months, couldn't charge it anymore. Connected a spare battery to it for less than 30 seconds, tried charging, and everything works! Thanks!
I cut both ends off some jumper cables and it worked perfectly thank you so much. I bought a tool set and I thought the batteries were bad. And now they're charging dude you are so awesome
This short video is perfect to explain its not a simple task to just buy batteries and "get more" out of our electric equipment. Thanks for explaining this to us.
I am a homeowner with a day job who does not do anything construction related for a living. That being said I am working on framing out my basement and Bought this ua-cam.com/users/postUgkxHQsUrwNr5GQrnx9V4xDdUr56qxwuiBHt gun. I have done a few walls already, have probably shot a couple hundred nails through this thing and have yet to have a misfire. It works awesome, good depth on every nail if you have your compressor set right. My literal only complaint is that it is a bit heavy and my arm can get a little tired especially whrn I am nailing at odd angles. That being said I am super happy with it and would buy it again. Hoping the old girl allows me to get my whole basement finished out!
There is another kind of power nailer you should be aware of. It has a small internal hammer that will hit very rapidly to drive a nail in less than a second. Likewise air powered. Less than $45 to buy new. Downside is that it doesn’t hold nails inside it, only acts as a power hammer. Upside (besides the lower cost) is that it can drive any size nail, and is easily controllable as to depth. Plus you can maneuver it into just about any space you want, as it is less than palm sized.
I had a brand new out of the box milwaukee battery that would charge so I grabbed a piece of romex hooked it to another one of my milwaukee batteries for 2 minutes and put it on the charger and it immediately started charging..this is a great hack
I searched different videos but yours was the one that I felt I could follow best. It worked for me, saved me from buying a new battery and not sending it to the dump or to hopefully get recycled. Great video and great instructions, to follow at your own risk, love it!! Thanks!!!
Thank you so much for the tutorial. I saw some other video and used a simple steel wire and it just burned out !! I had totally missed out on the Amp and Wattage understanding. It took a a $1 for a feet of 14 gauge wire and 30 seconds to charge my dead battery. You saved me exactly 99$
This rocks! I had a Craftsman battery that I never could charge. After putting on a small charge for like 30 secs, it started right up on the charger. So cool, thanks!
Dang this worked. I straight touched the wires from a good battery to the dead - literary touched it for 3 seconds and Wam- worked immediately. Thank you!
I like the solid wire trick. I use an auto spade connector with a test lead but those connectors are SO small I am always loosing them. I'll try yours. !
Thank you so much for such a clear and helpful video! Just "jump started" one of my Milwaukee m12 CP 3.0 batteries that wouldn't charge but would still start a tool, just showed low battery. Was registering a little less than 10 V, 80 seconds later, showing 10.8 V, showed two bars on a power tool, and plugged it into the charger and it started charging as it is supposed to. Again, thank you so much! Saved me buying another battery or a $73 service few to Milwaukee since it's outside the warranty range!
I like the way you just hammered the wire flat, I pissed around looking at Stanley knife blade's and picture hook's till I found four matching slim hook's
I have 4 black and decker batteries I've had for over 20 years, 2 of them I have "rebooted" multiple times and they still work as backups. They tend to release their power faster than my new ones but they are there when i need them.
Thank you for this! I just attempted this and it worked with my 2 Milwaukees, had one at 20v and the other I couldn't even get a reading or at least a volt. Connected them for about 30 seconds and the 2nd reading jumped around 12 to 15v, the dead one then took the charge.
Worked like a charm just like he said it would I can’t believe it. The only issue is you must have the same battery luckily I had one. Excellent! Works again.
It is worth opening the battery pack [ I presume it is out of warranty, because doing this will void it]. The thing to do is to check each cell to see if the voltage on all are more of less the same. One or more cells on a lower voltage means those cells are toast, so this method will not work. If you are good with a soldiering iron you can de-solder the trashed one[s], replace them, and try again. [At your own risk, blah blah blah]. If you start a fire with a lithium battery, they are really hard to put out, even with the proper class of fire extinguisher, so there's that. If a Lithium battery gets too hot you will have a "thermal runaway" which is super bad news. The smoke emitted can be highly toxic. Some cells contain lead, nickel, cadmium, mercury, and electric car batteries, cobalt. If you breathe cobalt for example, you are dead. So if you are anywhere near such a fire, go upwind and away. FAST. Probably why such hacks are not recommended.
I will like to say thank you I have seen videos on this subject in the past this only reason for me to be looking for this and seeing you is I found a hart tool on the side of a road must have fallen off someone's truck I had this tool about 3 years now yep it be dead Then my Milwaukee tool died after 15 years so in the interest of saving a few Lincolns I got a charger and that problem well I did do it pretty close only difference was I used a 19 Guage wire the thing I noted was the battery did get hot the other thing was it needed to cool a few minutes then it wanted to work well need mention I did try once while it was hot and nothing till after it cooled now it is holding a charge I figured I have nothing to lose I found it And you talked me in to it with a fine video brother Otherwise it would be still a paper weight Then that other thing you mentioned was Milwaukee is apparent company indeed that's nice all although it don't handle like the Milwaukee free is the price no complaint Good job done
I have done this on car batteries and a lawnmower battery where the smart charger isn't smart enough to charge a completely dead battery, and 1.5[1.2]volt rechargeable AA batteries. It hasn't failed yet.
Thanks a lot for this video! Checked 2 Mensela 2 Ah and 2 6 Ah (50 USD each). One showed 4 lights, the other a poor shadow of one LED, and it took no charge. Kicking, jump starting, the poor battery a few minutes, like You did, and it takes charging! Wow! No surprise. Opening the sad battery quite some electronics sits inside. If the voltage goes down too much the built in controller doesn't run and then no charging is performed.
Heard of this quite some time ago and didn't believe it, at least not fully but to my surprise it worked. Also great step by step guide. I'm not well enough informed to recommend this to others but it's a start, thanks a lot.
Also you're able to do that the cheaper battery packs where you jumpstart them most high-end battery packs like Milwaukee have protection boards that won't allow this but the cheaper packs without protection boards you can
I Did mines with 14 gauge wire I got from my neighbor and its worked. I did just as he said 5 min and place it on charger, it's charging back up. Thank you.
It did work for me: I had a Ridgid 18V that was showing less than 1V at the +/- terminals. I used a bench power supply (0-30V 0-5A) and set the voltage to 18V and amps to minimum. I slowly eased the amps up until the CV/CC lights switched over. That was about 3A of power. I left it on for about 2 minutes, then disconnected, checked voltage and it showed about 12V no load. Hooked that up to the charger again and it is now charging :)
I live in Las Vegas and temp nowadays is always 100+. degrees. My tools are in my not-air conditioned work place. One of my batteries just stop working. I put it in refrigerator for few minutes and it worked. So before doing anything I just put them in refrigerator. Now I remember when the battery I left under the sun for a day. I should have tried cooling it before unsuccessfully repairing it. If all cell of battery are good this will work but if any (even only one) is bad this method will not because the bad battery will not charge and the rest are over so the total is correct but will not last. You will notice that the good battery will overheat due to overcharging. You can test and change the bad cells. Note that most cell/battery have protection and if they open it is hard to repair. My experience in testing and repairing each cell. If the protection is closed. 1. I notice that most drill uses 3 + volt individual batteries and I believe each cell is always 1.2 volt. I assume (correct me if I’m wrong). That the 3+v battery used have 2 cells. So even if the battery is getting charged it will go to 3 v but in short goes back to low charge like 1 volt. 2. The method described by the author will also work for individual cell as long as the battery still good. 3. I’ve used several unsafe ways to revive battery. Please don’t do. I think this the better way or you can buy a charger. If the battery reached say 3.+ volt and stayed for hours it good. Be sure to assemble and use the right charger. 4. After trying several times and failed I’ll just buy individual batteries or the complete batteries. In buying (eBay), some sell really good. Found one with warranty. One battery from another seller broke in life’s weeks. 5. I tried this method before and this method is the safest. With rigid battery I believe you have to use jumper from + to one of the t terminals To make it work. I think it’s t2. Note that this method works because if there is something wrong with the battery the charger will not start ( no voltage in + and - posts). But my rigid battery has complicated circuit (to ensure individual cell gets the right voltage / charge). So it needs a jumper to fool the circuit. 6. Good reminder by Mr “kite”- keep batteries charged. Don’t store discharged and completed discharge - that’s why some have protection to prevent too discharge
Super, thanks heaps! I had no luck with an 6Ah 18V (20V US) battery starting up a 9Ah 54V (60V US) battery but when I used a battery with the same voltage as you suggested then it worked! Whoohooo! I was nervous using my expensive battery to do it but it was a winner! Thanks again. I actually got ripped off on Facebook Marketplace after being sold a battery cheap and then getting home and it not charging and the bloke blocking me so I could not follow up! I felt pretty dumb but turns out I got 54V 9Ah battery for $90 Australian dollars. Whoohooo! Did I say thank you!!!!
I did this and it worked. All because I didn't read the manual and charge the battery before use. It seems like it is taking a very long time to charge though.
I've got 3 porter cable batteries that all simultaneously decided they'd charge for 30 seconds and then be complete. So I thought it was the charger. Replaced the charger. They'll charge for an hour now but then say complete. However you connect em to a tool, they are all dead. Porter cable also discontinued. So I don't know if they need a jumpstart or if I should just use knockoffs from now on
Just worked for me, dead one has green light on the charger anyway. Had to buy another $70 battery to do it, but now I have 2. It'll be nice not to have to swap from drill to drive.
Unfortunately while the jumped battery appeared to be charging, after the green charger light went out, the battery was still dead as doornail. Certainly worth a try though.@@Kitearmy
You did right thing by saying don't do what I'm doing . Guys study li-ion battery and get an understanding what and why is going on or you can get a very nasty fire fast .
Yes this does work however, the newly recharged batteries will only last like 24hrs after that they will go back to not being able to be read by the charger so there for you will have to do this method again which will most likely ruin the good battery.
I came across with your post and thank you very much..if you're near here I'm going to treat for a beer. I followed your instruction and My new battery worked!!!! Thank a lot sir!!. God bless!!
Trying this tomorrow with a Festool batter that refuses to charge. I'll have a fire extinguisher on the side just in case. One thing that needs correcting: Nickel and lithium-ion batteries should always be stored at around 40% charge
Who knew! Great share. 💯💯💯 *Andrew, you are making me drunk too much. Every time you say, "Guys" I take a drink, and by the end of your video, I'm wasted! It's a throwaway word, much like when kids say, "like" three times in each sentence. It comes across as if you are trying to hold our attention. You're so good, we're not going anywhere! Thanks. 👍
I have been trying this on my 48v lawn mower battery. When I plug the last of the 4 connections in (be that +ve or -ve), it gives a spark and small explosion - any idea why that is? Anyway, by Jove it worked. Saved £160 for a new battery!
I want to caution folks not to do what I did. If you “jump” too long, you will deplete the good battery below charger’s acceptable levels. Then you will have another useless battery. How do I know? I had an 82V battery system. One good-ish battery, one bad one. I measured voltages on all three. 82.3, and 56.4V. I jumpered exactly as shown in the video, but let it go 15 minutes. I then tested voltages: 74.5 and 73.2V. I then tried putting the batteries in the charger; it wouldn’t charge either one. Duh. My guess is that I should have tried jumpering for one minute max, then put the good battery back in the charger to recharge back to nominal. The bad battery would likely still have failed, but I could have repeated this sequence numerous times until both batteries were charged enough. Right now, though, I have no good batteries. Hopefully you can learn by my error.
I have a Worx 24 volt battery that went dead. However, I do not have another 24 volt battery. I do have a 40 volt Black & Decker (higher) or an 18 volt Performax. But from what you sre saying, I MUST HAVE the same voltage? So I would either need another 24 volt good battery or I am SOL. Is that correct? What could happen that is a bad outcome if I tried using either the 40 volt or 18 volt to attempt the jump start the 24 volt? Just curious.
Why does the voltage have to be the same on the jump start battery? Wouldn't a more voltage battery equate to a better jump start? I used an 18v/54v dewalt jump start battery for my 10.8V dead lawn mower battery. It didn't work. I got the lawn mower battery to one signal light charged but that wasnt enough to get the charger to fully charge it. And I dont have a multimeter to test how many volts it is. Where am I suppose to find another 10.8V battery?
I've got a cordless lawnmower battery that shows fully charged but wont power the mower for more than a few seconds....It's not the mower as a friend tried my battery in their same mower and had the same problem with my battery....any tips please?
I know ego batteries are far superior to every li-on batteries available. Is popular mechanics wrong about storage. Ego batteries discharge after 30 days sitting idle to 30% charge. So they are saying not to store with a full charge to maintain batteries. Who is wrong ? Is ego doing that so that the batteries die and need to be replaced? If so why offer 3 year warranty? I am not criticizing you by any means. This was a great video that may help many people. Buut at $150,$250,$350 and now $450 for ego batteries i would like to keep them in tip top shape and avoid a major cost to replace. " these are not your daddys AAA's of old " if you could help please clarify. Love your channel mate
Alright so here is the deal - batteries really like to be mothballed at around 70-90%. Ego discharges there batteries to 80% after a month. This is a good thing. Now the real problem is when people but a battery at 10% on the shelf for six months. All cells loose power over time and this leads to a possible dead battery. SO my point is more batteries die from being low charged than being high charged
What if I don't have a spare battery? Can I run the + and - terminals to the charger directly? I noticed mine has 4 terminals, but only 2 are + and -??
![RYOBI 18V Battery Not Working? [Easy DIY Charging Hack]](/img/n.gif)
56 years old and still learning smething new everyday and this was by far one of the best lessons yet
If you notice once you hook up to test the battery the second time (after the jump) its steadily dropping in voltage...... The battery has a bad cell in it. Ive jumped several different types and size batteries in the last few years, and over time, I've discovered that no matter the type or size, if it has a bad cell, (or cells) it will continue to drain. Thus that battery will continue to drain over time faster than a battery that doesn't have a bad cell. There are ways to replace individual cells but that is not as easy for just anyone to do. Excellent vid though, and hope that info helps.
Can I jump a 12v onto the dead 20v
@@scottschmittmusic thats what I'm wondering, he says at 1:50 "the voltage matters", but I was thinking as long as its the same type of battery it should work, and I'm just making what I thought was a somewhat educated guess. LOL
@scottschmittmusic No you need at least the same voltage (but also not too much higher) less will not charge it. Although if you put two 12V batteries in series, then you'd be in business.
Have a blessed day!
61 year old professional tech here, you just saved my old battery packs, many thanks. Always learning!
hey mate - make sure to sub
Worked like a charm. Thank you. Got a Black and Decker for Christmas that wouldn't charge out the box. Did this with a fully charged Worx battery and now it's charging. 🤘🏾
Worked for me!
Left the battery uncharged in the basement for 5 months, couldn't charge it anymore. Connected a spare battery to it for less than 30 seconds, tried charging, and everything works!
Thanks!
Outstanding!! So much easier than other videos, I saved well over $100 using this video to save 5 dead, unchargable batteries!! Thank u sir!!!!
And I have 18v ryobi
I cut both ends off some jumper cables and it worked perfectly thank you so much. I bought a tool set and I thought the batteries were bad. And now they're charging dude you are so awesome
Excellent!
This short video is perfect to explain its not a simple task to just buy batteries and "get more" out of our electric equipment. Thanks for explaining this to us.
Well said!
I am a homeowner with a day job who does not do anything construction related for a living. That being said I am working on framing out my basement and Bought this ua-cam.com/users/postUgkxHQsUrwNr5GQrnx9V4xDdUr56qxwuiBHt gun. I have done a few walls already, have probably shot a couple hundred nails through this thing and have yet to have a misfire. It works awesome, good depth on every nail if you have your compressor set right. My literal only complaint is that it is a bit heavy and my arm can get a little tired especially whrn I am nailing at odd angles. That being said I am super happy with it and would buy it again. Hoping the old girl allows me to get my whole basement finished out!
There is another kind of power nailer you should be aware of. It has a small internal hammer that will hit very rapidly to drive a nail in less than a second. Likewise air powered. Less than $45 to buy new. Downside is that it doesn’t hold nails inside it, only acts as a power hammer. Upside (besides the lower cost) is that it can drive any size nail, and is easily controllable as to depth. Plus you can maneuver it into just about any space you want, as it is less than palm sized.
I had a brand new out of the box milwaukee battery that would charge so I grabbed a piece of romex hooked it to another one of my milwaukee batteries for 2 minutes and put it on the charger and it immediately started charging..this is a great hack
I searched different videos but yours was the one that I felt I could follow best. It worked for me, saved me from buying a new battery and not sending it to the dump or to hopefully get recycled. Great video and great instructions, to follow at your own risk, love it!! Thanks!!!
You're welcome!
Thank you so much for the tutorial. I saw some other video and used a simple steel wire and it just burned out !!
I had totally missed out on the Amp and Wattage understanding. It took a a $1 for a feet of 14 gauge wire and 30 seconds to charge my dead battery. You saved me exactly 99$
Great - throw me a sub
This rocks! I had a Craftsman battery that I never could charge. After putting on a small charge for like 30 secs, it started right up on the charger. So cool, thanks!
Great - make sure you sub
Worked great. I only left it for about 30 seconds and tested it and was already good. Thanks!
Good job. I emphasize again not to drain the good battery too far.
Just saved two dewalts and one Worx, you are the man. Thank you!
cool - throw me a sub
Dang this worked. I straight touched the wires from a good battery to the dead - literary touched it for 3 seconds and Wam- worked immediately. Thank you!
Thanks for the sub
I like the solid wire trick. I use an auto spade connector with a test lead
but those connectors are SO small I am always loosing them. I'll try yours.
!
Thank you so much for such a clear and helpful video! Just "jump started" one of my Milwaukee m12 CP 3.0 batteries that wouldn't charge but would still start a tool, just showed low battery. Was registering a little less than 10 V, 80 seconds later, showing 10.8 V, showed two bars on a power tool, and plugged it into the charger and it started charging as it is supposed to. Again, thank you so much! Saved me buying another battery or a $73 service few to Milwaukee since it's outside the warranty range!
glad to help - please throw me a like and sub
I like the way you just hammered the wire flat, I pissed around looking at Stanley knife blade's and picture hook's till I found four matching slim hook's
Yeah - it is a simple little hack
I have 4 black and decker batteries I've had for over 20 years, 2 of them I have "rebooted" multiple times and they still work as backups. They tend to release their power faster than my new ones but they are there when i need them.
Thank you for this! I just attempted this and it worked with my 2 Milwaukees, had one at 20v and the other I couldn't even get a reading or at least a volt. Connected them for about 30 seconds and the 2nd reading jumped around 12 to 15v, the dead one then took the charge.
Worked like a charm just like he said it would I can’t believe it. The only issue is you must have the same battery luckily I had one. Excellent! Works again.
Thanks mate - make sure you sub
3 years later it's still working. Thanks
Thanks for the wire hammering idea . Saves me muck'n about with croc. clips and bits of metal . Perth , Western Australia .
I wish I had another identical battery to fix my 24v but like you said, you need another 24v to do this. Thanks for the tip
Do you have two 12 volt batteries by chance? You can wire those two 12 volt batteries in series and then charge your 24 volt with those.
It is worth opening the battery pack [ I presume it is out of warranty, because doing this will void it]. The thing to do is to check each cell to see if the voltage on all are more of less the same. One or more cells on a lower voltage means those cells are toast, so this method will not work. If you are good with a soldiering iron you can de-solder the trashed one[s], replace them, and try again. [At your own risk, blah blah blah].
If you start a fire with a lithium battery, they are really hard to put out, even with the proper class of fire extinguisher, so there's that. If a Lithium battery gets too hot you will have a "thermal runaway" which is super bad news. The smoke emitted can be highly toxic. Some cells contain lead, nickel, cadmium, mercury, and electric car batteries, cobalt. If you breathe cobalt for example, you are dead. So if you are anywhere near such a fire, go upwind and away. FAST.
Probably why such hacks are not recommended.
I will like to say thank you
I have seen videos on this subject in the past this only reason for me to be looking for this and seeing you is I found a hart tool on the side of a road must have fallen off someone's truck I had this tool about 3 years now yep it be dead
Then my Milwaukee tool died after 15 years so in the interest of saving a few Lincolns I got a charger and that problem well I did do it pretty close only difference was I used a 19 Guage wire the thing I noted was the battery did get hot the other thing was it needed to cool a few minutes then it wanted to work well need mention I did try once while it was hot and nothing till after it cooled now it is holding a charge I figured I have nothing to lose I found it
And you talked me in to it with a fine video brother
Otherwise it would be still a paper weight
Then that other thing you mentioned was Milwaukee is apparent company indeed that's nice all although it don't handle like the Milwaukee free is the price no complaint
Good job done
Was thinking about trying this exact thing and you've given me the confidence to try it!
I have done this on car batteries and a lawnmower battery where the smart charger isn't smart enough to charge a completely dead battery, and 1.5[1.2]volt rechargeable AA batteries.
It hasn't failed yet.
Cool - have you ever tried this on a battery
Wow! Totally works. I saved a Dewalt battery and a Black and Decker battery with this method. Thanks. Saved me a bunch $
Thanks mate - throw me a sub
Thanks a lot for this video!
Checked 2 Mensela 2 Ah and 2 6 Ah (50 USD each). One showed 4 lights, the other a poor shadow of one LED, and it took no charge. Kicking, jump starting, the poor battery a few minutes, like You did, and it takes charging! Wow!
No surprise. Opening the sad battery quite some electronics sits inside.
If the voltage goes down too much the built in controller doesn't run and then no charging is performed.
Unfortunately the battery only charge up to 13 volt, not 18 - 20, and is scrap.
Heard of this quite some time ago and didn't believe it, at least not fully but to my surprise it worked. Also great step by step guide. I'm not well enough informed to recommend this to others but it's a start, thanks a lot.
happy to help
Also you're able to do that the cheaper battery packs where you jumpstart them most high-end battery packs like Milwaukee have protection boards that won't allow this but the cheaper packs without protection boards you can
I Did mines with 14 gauge wire I got from my neighbor and its worked. I did just as he said 5 min and place it on charger, it's charging back up. Thank you.
AWESOME - love to rescue good batteries
It did work for me: I had a Ridgid 18V that was showing less than 1V at the +/- terminals. I used a bench power supply (0-30V 0-5A) and set the voltage to 18V and amps to minimum. I slowly eased the amps up until the CV/CC lights switched over. That was about 3A of power. I left it on for about 2 minutes, then disconnected, checked voltage and it showed about 12V no load.
Hooked that up to the charger again and it is now charging :)
Thanks for confirming what our thought process had in mind-just used this on a Motorola Impress battery, 20 second jump start and now on the charger.
Awesome - make sure you give me a like and sub
Dude, this was simple and to the point. I'm amazed at all the high quality stuff ur putting out these days. Beautiful!
Thanks mate - time to bring back some batteries from the dead
Another treatment for li on batteries ,is to freeze them,then take them out of the freezer and let them thaw ,revives them
I live in Las Vegas and temp nowadays is always 100+. degrees. My tools are in my not-air conditioned work place. One of my batteries just stop working. I put it in refrigerator for few minutes and it worked. So before doing anything I just put them in refrigerator. Now I remember when the battery I left under the sun for a day. I should have tried cooling it before unsuccessfully repairing it.
If all cell of battery are good this will work but if any (even only one) is bad this method will not because the bad battery will not charge and the rest are over so the total is correct but will not last. You will notice that the good battery will overheat due to overcharging. You can test and change the bad cells. Note that most cell/battery have protection and if they open it is hard to repair.
My experience in testing and repairing each cell. If the protection is closed.
1. I notice that most drill uses 3 + volt individual batteries and I believe each cell is always 1.2 volt. I assume (correct me if I’m wrong). That the 3+v battery used have 2 cells. So even if the battery is getting charged it will go to 3 v but in short goes back to low charge like 1 volt.
2. The method described by the author will also work for individual cell as long as the battery still good.
3. I’ve used several unsafe ways to revive battery. Please don’t do. I think this the better way or you can buy a charger. If the battery reached say 3.+ volt and stayed for hours it good. Be sure to assemble and use the right charger.
4. After trying several times and failed I’ll just buy individual batteries or the complete batteries. In buying (eBay), some sell really good. Found one with warranty. One battery from another seller broke in life’s weeks.
5. I tried this method before and this method is the safest. With rigid battery I believe you have to use jumper from + to one of the t terminals To make it work. I think it’s t2. Note that this method works because if there is something wrong with the battery the charger will not start ( no voltage in + and - posts). But my rigid battery has complicated circuit (to ensure individual cell gets the right voltage / charge). So it needs a jumper to fool the circuit.
6. Good reminder by Mr “kite”- keep batteries charged. Don’t store discharged and completed discharge - that’s why some have protection to prevent too discharge
Super, thanks heaps! I had no luck with an 6Ah 18V (20V US) battery starting up a 9Ah 54V (60V US) battery but when I used a battery with the same voltage as you suggested then it worked! Whoohooo! I was nervous using my expensive battery to do it but it was a winner! Thanks again.
I actually got ripped off on Facebook Marketplace after being sold a battery cheap and then getting home and it not charging and the bloke blocking me so I could not follow up! I felt pretty dumb but turns out I got 54V 9Ah battery for $90 Australian dollars. Whoohooo! Did I say thank you!!!!
Can you use any battery to jump another battery?? Or do they have to be the same??
No way man, this is fantastic. I have a real need for this! Thanks you so much!
Glad I could help!
WELL DONE, WILL TRY THIS WITH MY DEAD 20 V BLK DECKER.. IT WORKED, THANK YOU!!!!!
I fixed a dead battery I found from the dump for my ryobi tools works perfect
nice - now sub
I did this and it worked. All because I didn't read the manual and charge the battery before use. It seems like it is taking a very long time to charge though.
Cool!
Can u do it with ryobi 40v batteries
Omg I have like 6 batteries that won’t charge after watching this video im going to try this method great video
Good luck!
Tried on my Canadian tire impact 14.4 volt wrench and it worked. 14.4 v batteries are not made anymore.
Thanks
did it work
Kite army I have an old model dewault drill the batteries doesn’t work is there a replacement that can fit to work ???
Thanx, sceptical but I tried it , hot dang! It worked!
I've got 3 porter cable batteries that all simultaneously decided they'd charge for 30 seconds and then be complete. So I thought it was the charger. Replaced the charger. They'll charge for an hour now but then say complete. However you connect em to a tool, they are all dead.
Porter cable also discontinued. So I don't know if they need a jumpstart or if I should just use knockoffs from now on
Just worked for me, dead one has green light on the charger anyway.
Had to buy another $70 battery to do it, but now I have 2. It'll be nice not to have to swap from drill to drive.
Cool - make sure you throw me a like
Unfortunately while the jumped battery appeared to be charging, after the green charger light went out, the battery was still dead as doornail.
Certainly worth a try though.@@Kitearmy
You did right thing by saying don't do what I'm doing . Guys study li-ion battery and get an understanding what and why is going on or you can get a very nasty fire fast .
Store your battery in a cooler environment like indoors and put battery at around 40 percent if storing it for a long time.
Storing indoors is a good suggestion
Your video just saved my batteries. It does work. Thanks!!!
Thanks for saving me $180+ on my Lowes Kobalt 5amp battery! I really appricaite it 😊
your welcome - throw me a sub
Yes this does work however, the newly recharged batteries will only last like 24hrs after that they will go back to not being able to be read by the charger so there for you will have to do this method again which will most likely ruin the good battery.
Thank you for a very easy, clear to understand, video.
I came across with your post and thank you very much..if you're near here I'm going to treat for a beer. I followed your instruction and My new battery worked!!!! Thank a lot sir!!. God bless!!
What if you only have one completely dead battery?
Was this work with the Ryobi?
Trying this tomorrow with a Festool batter that refuses to charge. I'll have a fire extinguisher on the side just in case. One thing that needs correcting: Nickel and lithium-ion batteries should always be stored at around 40% charge
I did it and it worked tx a lot
sure - could you throw me a sub and a like - TX
It's crazy I did that to jump start my truck years ago with my Ryobi 18v battery
Thanks for the video, just saved three batteries 👍
Do you leave lithium batteries fully charged too?
Another site said lithium should never be left fully charged, only 80%?
Thanks
Who knew! Great share. 💯💯💯
*Andrew, you are making me drunk too much. Every time you say, "Guys" I take a drink, and by the end of your video, I'm wasted! It's a throwaway word, much like when kids say, "like" three times in each sentence. It comes across as if you are trying to hold our attention. You're so good, we're not going anywhere! Thanks. 👍
like thanks guy ;)
I have been trying this on my 48v lawn mower battery. When I plug the last of the 4 connections in (be that +ve or -ve), it gives a spark and small explosion - any idea why that is? Anyway, by Jove it worked. Saved £160 for a new battery!
Any other kind of wiring that we can use? Not sure I have some spare household wire lying around
Great hair Man. I can't wait to have just enough gray. 😊
your still going to want to run the battery through a couple cycles, up and down to make sure its gotten through that memory spot.
I want to caution folks not to do what I did. If you “jump” too long, you will deplete the good battery below charger’s acceptable levels. Then you will have another useless battery.
How do I know? I had an 82V battery system. One good-ish battery, one bad one. I measured voltages on all three. 82.3, and 56.4V. I jumpered exactly as shown in the video, but let it go 15 minutes. I then tested voltages: 74.5 and 73.2V. I then tried putting the batteries in the charger; it wouldn’t charge either one. Duh.
My guess is that I should have tried jumpering for one minute max, then put the good battery back in the charger to recharge back to nominal. The bad battery would likely still have failed, but I could have repeated this sequence numerous times until both batteries were charged enough. Right now, though, I have no good batteries.
Hopefully you can learn by my error.
It’s easier just to,do,it with a normal car battery charger. Works with every battery regardless of voltage or amps…
GGreat video, I have 2 bauer 20v batteries I'm going to try this with.
the trick is working.Very usefull! Thanks!
I’m going to try this on my ego 5.0 hopefully it works🤞🏽
I have heard rumors that it might work
Keep us updated bc my 7.5 stopped charging.
Thank you
I worked for me.
You got a new subscriber. I will tell everyone.
Thanks for the sub
I just did it on my 18v 3/8" impact wrench battery and it started to work as he said. Great thanks alot. Don't have to buy a charger or battery.
Wow bro it worked, you saved me a lot of $$$
Nice
I have a Worx 24 volt battery that went dead. However, I do not have another 24 volt battery. I do have a 40 volt Black & Decker (higher) or an 18 volt Performax.
But from what you sre saying, I MUST HAVE the same voltage? So I would either need another 24 volt good battery or I am SOL. Is that correct?
What could happen that is a bad outcome if I tried using either the 40 volt or 18 volt to attempt the jump start the 24 volt? Just curious.
Thank you so much. Nice& simple. Direct& to the point
Happy to help
So for how long we should connect the cable between the battery in order to jumpstart it ?
Why does the voltage have to be the same on the jump start battery? Wouldn't a more voltage battery equate to a better jump start? I used an 18v/54v dewalt jump start battery for my 10.8V dead lawn mower battery. It didn't work. I got the lawn mower battery to one signal light charged but that wasnt enough to get the charger to fully charge it. And I dont have a multimeter to test how many volts it is. Where am I suppose to find another 10.8V battery?
You only want to store nickel cadmium or nihm 1.2 volt cells which are the old type no longer used anymore at full charge
It worked. Thank you so much for this video.
Great to hear!
This may well work but certainly the charged battery may no longer hold charge for long as expected
/220324
Now i assume you could do this with ego right, or could you somehow void their warranty by ding it, if something were to go wrong.
Works like a charm!
Sure does
Awesome hack!!!! Actually works
Like the energy and subscribed
Thanks mate
I've got a cordless lawnmower battery that shows fully charged but wont power the mower for more than a few seconds....It's not the mower as a friend tried my battery in their same mower and had the same problem with my battery....any tips please?
Thanks. Worked for me.
Glad it helped
Can i do this from a 18v 5ah bosch to 36v 7.5ah from karcher?
Yep, worked, revived a 50 dollar battery, ryobi, used furniture clamps to hold the wires on the pasts. Kewl!
Nice job - give me a sub
great info i need to try that on several my old defunct batteries
Go for it!
It worked for me.. Thanks!
What is it in the charger that recognizes the issue. Maybe if it’s removed the charger could charge? At your own risk of course
You sir yes you sir you saved my life thank you
Thank you - pls sub
I know ego batteries are far superior to every li-on batteries available. Is popular mechanics wrong about storage. Ego batteries discharge after 30 days sitting idle to 30% charge. So they are saying not to store with a full charge to maintain batteries. Who is wrong ? Is ego doing that so that the batteries die and need to be replaced? If so why offer 3 year warranty? I am not criticizing you by any means. This was a great video that may help many people. Buut at $150,$250,$350 and now $450 for ego batteries i would like to keep them in tip top shape and avoid a major cost to replace. " these are not your daddys AAA's of old " if you could help please clarify. Love your channel mate
Alright so here is the deal - batteries really like to be mothballed at around 70-90%. Ego discharges there batteries to 80% after a month. This is a good thing. Now the real problem is when people but a battery at 10% on the shelf for six months. All cells loose power over time and this leads to a possible dead battery. SO my point is more batteries die from being low charged than being high charged
What if I don't have a spare battery? Can I run the + and - terminals to the charger directly?
I noticed mine has 4 terminals, but only 2 are + and -??
Thanks for the info. I just did this process on a 36V battery using a 40V battery and it's now Charging.
how did it go?