Great. Use an ahmeter with max/min .- hold function so you can record the results of your beautiful very useful test. Thanks so much to take the time and share !!
Nice I was looking for this information I'd like to see this on a lot of tools like I know there are a lot of big drain tools like Milwaukee the chainsaw and lost of stuff that I wouldn't run a single set of 18650s on but I'd like to see the current on that and the big impacts
A shame you didn't measure the current under maximum load or when it stalls. I too am I'm looking to build a cordless to corded adapter. Was planning on a 20A 360W switcher, but based on this, it looks like that might not be sufficient.
Yes - I didn't have anything handy to put a big load on it. I do plan to do more tests but have been too busy as of late. I did recently trip the overload safety on a battery while using a 1" speed drill to go thru house beams for cabling so I think the max load is significantly higher...I have heard claims the batteries trip out at 30-40 amps so my speculation is it would be higher than that for heavy loads.
@@matthewmiller6068 Wow, I've never tripped the battery overload before. I have the same 4 Ah batteries, and I use with a ton of different tools: drill, impact, sawzall. Looking to get a circular saw soon. New sub now, will be looking forward to any additional stuff you post.
@@matthewmiller6068 ya I salvage cells from tool batteries and I think the only ones I have seen with the protection built into the cells themselves are ryobi you can reset them with a like tiny screwdriver under the positive of each cell you just push it down and they work and generally capacity test alright but I just trash them or recycle but I don't recall the brand of cells it generally is and I believe most cells have that built in but I just don't see that as the problem on other brands
This is the video I was looking for! Because I want to convert a cordless tool (black&decker multievo 20v max) into a cord one, so I need a transformer that deliver a max limit of amps for it. Do you think I have to consider something else to make my idea work safely?
Probably not? Biggest thing with high current you will need to size your wires carefully, if its only a couple feet 10AWG may do but for a longer run you may need 8 or even 6AWG. I often overbuild stuff just in case. There are wire size charts online to look up what size wire for a given length can carry how many amps safely. And make sure your DC power supply is rated for the amount of power you will be drawing. As usual consult any manuals it may come with to see if it requires fuses or anything to protect the power supply from overload. I have not got to test under a very heavy load (like 2 hands driving into hardwood or running a hole saw) my unsubstantiated guess is it may peak as much as 50 amps at very heavy load. I was only grabbing the chuck with one hand to slow it, I know this thing is powerful enough to smash my hands against stuff when it binds and I have the trigger all the way down.
Ya it would be bulky corded option with the wire gauge and you would need a decent size supply and I was thinking maybe some super caps for the surge probably not worth the amount of time or the money or the size it would be and headaches of dragging it around
Yep - it's amazing how much power those little batteries can pump out. I have plans to test other of my Ryobi 18-volt tools (circular saw, leaf blower, string trimmer, sawzall) like this but have not had time to make a video yet.
Great. Use an ahmeter with max/min .- hold function so you can record the results of your beautiful very useful test. Thanks so much to take the time and share !!
Believe it or not somehow this project to test more still hasn't gone further, but I'm still curious so maybe one day!
thank u! it help me find the better c rating liion on my custom battery pack. i guess i go for 10c.
Nice I was looking for this information I'd like to see this on a lot of tools like I know there are a lot of big drain tools like Milwaukee the chainsaw and lost of stuff that I wouldn't run a single set of 18650s on but I'd like to see the current on that and the big impacts
A shame you didn't measure the current under maximum load or when it stalls. I too am I'm looking to build a cordless to corded adapter. Was planning on a 20A 360W switcher, but based on this, it looks like that might not be sufficient.
Yes - I didn't have anything handy to put a big load on it. I do plan to do more tests but have been too busy as of late.
I did recently trip the overload safety on a battery while using a 1" speed drill to go thru house beams for cabling so I think the max load is significantly higher...I have heard claims the batteries trip out at 30-40 amps so my speculation is it would be higher than that for heavy loads.
@@matthewmiller6068 Wow, I've never tripped the battery overload before. I have the same 4 Ah batteries, and I use with a ton of different tools: drill, impact, sawzall. Looking to get a circular saw soon. New sub now, will be looking forward to any additional stuff you post.
@@matthewmiller6068 ya I salvage cells from tool batteries and I think the only ones I have seen with the protection built into the cells themselves are ryobi you can reset them with a like tiny screwdriver under the positive of each cell you just push it down and they work and generally capacity test alright but I just trash them or recycle but I don't recall the brand of cells it generally is and I believe most cells have that built in but I just don't see that as the problem on other brands
Thank you.
This is the video I was looking for! Because I want to convert a cordless tool (black&decker multievo 20v max) into a cord one, so I need a transformer that deliver a max limit of amps for it. Do you think I have to consider something else to make my idea work safely?
Probably not? Biggest thing with high current you will need to size your wires carefully, if its only a couple feet 10AWG may do but for a longer run you may need 8 or even 6AWG. I often overbuild stuff just in case. There are wire size charts online to look up what size wire for a given length can carry how many amps safely. And make sure your DC power supply is rated for the amount of power you will be drawing. As usual consult any manuals it may come with to see if it requires fuses or anything to protect the power supply from overload.
I have not got to test under a very heavy load (like 2 hands driving into hardwood or running a hole saw) my unsubstantiated guess is it may peak as much as 50 amps at very heavy load. I was only grabbing the chuck with one hand to slow it, I know this thing is powerful enough to smash my hands against stuff when it binds and I have the trigger all the way down.
Ya it would be bulky corded option with the wire gauge and you would need a decent size supply and I was thinking maybe some super caps for the surge probably not worth the amount of time or the money or the size it would be and headaches of dragging it around
Thanks....
Curious if you've done the orbital sander yet.
Sadly haven't got one of those and haven't had time to do other tools I do have yet
they never said what is the power rate of those cordless drill .. now it is 20*20=400 w .
Yep - it's amazing how much power those little batteries can pump out. I have plans to test other of my Ryobi 18-volt tools (circular saw, leaf blower, string trimmer, sawzall) like this but have not had time to make a video yet.