I have 2 lifePO4 12v 8Ah I bought the first of this month. I bought a charge you have to set type of battery number of cells, voltage, etc. I tried to see the charger work. When I hook either battery up and try to start the charge I get a cell warning on both and no charge. My other charger gives me a cell balance problem. What do you think? I just got one of the Miady 20ah batteries today. The charger is at my office so haven’t had a chance to try it with either charger.
check the voltage of each group of cells. you have 4 groups in your battery. they should be anywhere from 3.2v-3.65v. Also if your balance leads are connected wrong this could pose a problem. Good luck
Thanks for video and a lot of information, I'm building a 4s 1p 18650 battery pack for a drone my skyrc charger has settings for either lipo or life battery can I use it to charge this 18650 pack. Thanks again
Once Lifepo4 Batteries are Fully Charger, I have been Told that you Do NOT want to Float them ( and IF YOU DO, to do so at 13.20 Volts --- so No more Current flows into them).
Thanks! short answer NO. Long answer as long as charge voltage doesnt exceed the battery voltage you could. They both charge with CC/CV and are the same charger but with different voltage output. Li-ion is a 3.7v nominal and LifeP04 is 3.2v nominal.
Just bought 4 of the 38120s LiFePo4 cells from you. Im going to try to use them for a portable 300w monolight setup for my photography, still waiting on some things to come in. what do you suggest for a good BMS and charging system for the LiFePo4 batteries configured in 4s?
trying to shake my last bout of sickness, this time I lost 100lbs in 2 months. But feeling better everyday and I can't wait for you to get your tail down here.....I see some good opportunitiesfor both of us once you do!!
Same old Same old! My Health has been shot for the past 8 years and sometimes it catches up with me. Last time it took me down to 160lbs, this time I went from 280, to around 180. But I am feeling a little better every day!
Awesome video, very descriptive. Ive heard lithium ion cells can exceed 1000 cycles is this true? Im asking because i have an bike using lithium ion, i do charge to 4.168v per cell but i never run it lower than 25% soc do you think id be able to come close to that number of charge cycles? I never charge them higher than the given voltage and most of the time i dont run lower than 50% to try and prevent deep discharge
Thanks. yes some can but most can not. that said even thought they can that doesn't mean they will last long at even 400+ charge cycles. if a new one lasts say 1 hour charged to 4.2v after 200-300 charges they will only last 15 mins say. Hope this helps.
@@kristianwhiskin1070 These are usually rated around 500 cycles. Yes, you can exceed 1000+ cycles if you keep them in a smaller voltage range when you use them. Only charge up to 4.1V per cell or lower. Only discharge down to 3.5V per cell or higher. This will decrease your range. Parallel with another battery pack to increase your range. Also VERY Important....Do NOT charge and let them sit around, it is best to charge and then use the battery pack. If battery packs sit, it is best if the cells are at about 3.8V (slightly charged) when not used.
great video!!!....my understanding is LiFe batteries should NOT be charged at the standard rate as LiPo's ...but should be charged at at a much lower rate...example: I have been charging my LiFePo4 1700mah at a charge rate of 1.7 amps ( 1C ) ...is this incorrect and too high... what is the recommended charge rate formula for a 1700mah LiFe battery ?....I use this for my receiver in a RC airplane....thanks
Charge rate varies from battery to battery. Find out what brand and model you have and determine from there. 1 samsung can take 20a charge while another might only take 3a charge.
hi great video..so by my understanding the headway batteries would be the best for a 48v 2000 watt go kart?..15 in series..also what is the difference in the headway hp batteries?..checked your shop and prices look good ..whats the best charger for these batteries..again thanks for the great advice and awesome videos!!!!!
Thanks carlos. The difference between them is standard headway 38120s is max 100a continuous discharge and 200a pulse at 10ah per cell and the HP is 200a cont. at 8ah. I don't have a 15s Lifepo4 charger but can order you one up on my next shipment if needed. Let me know.
I need power packs for my 6v game cameras and security cams. I am using four LiFePo4 6Ah wired in parallel for a total of 24Ah. They are charged with a 10W solar panel and a buck converter set to a maximum of 3.6 volts. For 6v I use a variable input boost converter set to an output of 6.1 v. The boost converter shuts down at about 2.5 volts and the internal batteries in the cams take over. With this setup the batteries cannot be over or under charged. They are working well. Without any sun the batteries will be good for about 45 days at the rate my cams are used. Seven+ hours of full sun will provide about 25% charge. Interestingly with the panels I use I’m getting about 20mA+ during cloudy/hazy days. That does help a little to extend the usage. At full sun the panels put out 800mA. No balancing circuit is necessary!
sorry I was thinking about the headway cell. yes if you have a 10a battery in 4s its 10a. yes series amps stay same voltage increases. parallel amps increase voltage stays the same.
Hey Wes, I appreciate your UA-cams. Can you help me; how would I calculate the reserve capacity of LifePo4 Batteries, whether in Series or Parallel configurations? How would I calculate the watt hours of these batteries?
jehovahstool thanks. You would have to have the proper charge and discharge charger to tell you these exact numbers of ah compacity but even then they could be the same new as they are in 3 yrs of use. The only true test is at full charge how long will they hold it and how long to deplete it under load. wh is volts x amp hours = wh
What is the safe discharge voltage for the 18650 without sacrificing charge cycles? I purchased a 72v bike with 80ah. The charger they gave me charges it to 88v instead of 84v. For some reason the battery BMS shuts down at about 72v. The controller also draws 600amps peak and has a constant current of about 350 amps. When you twist the throttle hard when the battery is low, im guessing the voltage sag is shutting off the BMS to the battery. Just trying to figure out safe low voltage for single cell or for the whole 72v pack. Thanks
how is your pack built? Meaning how many Series and how many parallel? what bike is it and what battery pack and charger is it from the company? This will better help to answer your question. Also do you know for sure the pack is built with 18650 and not prismatic cells?
hi.my girls mum has a headway superlight ebike.it hasnt been used for a while last year she said but battery seems very low i dont have charger but its kettle plug type but could i charge with my power supply 30v and a drok adjustable cc cv method say 2 amps at 28v for the 24v -lifepo4 8 cell i think pack.steve in uk
yes you can jump start the cell. hit it with say 12v and 20a for just 1 second. check the voltge before you start. If below 2v jump them. do NOT keep the high voltage on the cell for more than a second or 2 max. do this until the battery starts to show higher voltage up to 2.5v than charge it up from there with a standard 3.65v. If doing the whole pack it's a bit more tricky.
ROBERT FRIEND neither I buy from the company itself. I do not use Alibaba and I do not use a website that they have. the website they have is informative only you cannot purchase from it they don’t have an online store. They are a extremely large battery manufacturer and they don’t do Internet sales. They sell to wholesalers and distributors only that re-distribute the batteries. If you’re not buying batteries by the thousands or tens of thousands and as a wholesaler or as a distributor, you're better off finding a Headway distributor to sell you those batteries. Good luck Robert.
Was on your website, still doesn’t show the chargers.... last remark was that you guys would have them this week....(edit) shows ebike chargers... that’s about it for “chargers”
I have noticed since I have went lithium. Lead acid is is like comparing two sticks rubbed together compared to a match! I'm waiting for the battery equal to a zippo!
Another thing about used or nos cells . you don't know if they were stored properly. In a hot of cold storage for years. Hurts the usability and degradation can take the useful life!
@Brent Budd, Yes they are there now. We had to start adding them last night and today. I have several models, voltages and amperages up there now. Go check it out again. sorry for the delay. More will be listed tonight and tomorrow. Thanks for watching and checking out the site.
I like your great educational vid. Hi I have the EMMO GT80 scooter with 80V/20Ah Lead Acid battery. i want to upgrade. I want to build a (LiFePO4) battery pack that will equal 80V, 20AH. 1 or 2 or 4 batteries Whichever is the best and Economical way can this be done? 80V/20Ah (LiFePO4) battery or 2 x 40V(LiFePO4) battery =80V or 4 x 20V(LiFePO4) battery =80V
(STANDARD lithium-ion batteries WILL WORK FOR ME ALSO ... WOULD BE CHEAPER) Thanks
I've do ok buying used 38120 cells. You just have to understand they are in fact USED. Do your testing. Test them for Self Drain issue. Internal Resistance. Test them for Capacity verses Rated Capacity. Buying used was the only way I had to buy LeFePo4 in the numbers I needed. If the cell holds a charge for a few weeks. If the cell meets it's rated capacity. The cell is going to last you longer then any Lead Acid.
IF you get a GOOD used battery it can last longer than lead acid yes, however unless you know the age and actual use of the cell you could be throwing away your money. Sometimes you get lucky. Used is used at the end of the day and if you need to depend on it than I prefer new every time when it comes to battery cells. A LifePo4 cell should hold charge for months not a few weeks.
@@WesThatTechGuy A few weeks works for me. In a active system they will never go down. LOL I'm Broke. Only way to get the job done. In the military I maintained more then a few 2000Ah Battery banks. Lead Acid is a pain in the rump to keep up with.
@@WesThatTechGuy Actually your prices are better then fair. You can order then From China for like $10.0 a peace but then they hit you with shipping cost three times what you pay for the cells. Crazy stuff.
Yes we are fair on pricing. that's correct shipping, import fees and duties make them more than I'm selling them for. Our prices will only go up due to tariffs, supply and demand. We lowered them for a few but will be going back up to the $20 and above price soon.
I'm going to be building a very large battery bank with an inverter with used 18650 cells, I'll be building them in interchangeable blocks and it will have a voltage monitor on each block to see if it drains fast or self discharges, it will also be a ebike battery although it might be a bit bulky. I'm getting all the cells for free and wouldn't buy new anyways because I think it's too expensive even if it was 1$ per cell
Sir I have 5 lifepo4 batteries of 3.2v 6000mah each.connected all in parallel got 3.2v 30000mahn .so will you please tell me how voltage should be apply to it to get full charge or is there any pcb board available to charge it please tell me......
Would have been nice if you’d explained that the 12V lead acid cell was actually 6 cells in series internally. I love the headway cells but @ 75c a watt hour they don’t make a lot of sense in large applications. You can get them cheaper but you have to ask yourself why go to all that trouble when a PW2 includes cooling, charging, bms, inverter and sophisticated monitoring for less.
Next time if I can remember MondoTV. I would always prefer what I build over mass produced All-in-One PW2 or equivalent. It would cost me in the $18k range to get what i have from them and it still wouldn't be close. If one thing goes wrong with the PW2 then the whole unit is out of commission. I would love to have a couple of them but this makes more sense for me at this time. Thats my inverter battery combo I currently have in my home... 12kw inverter, 36kw of battery storage.
Seems to me to get the most out of Lion battery capacity you need to go 4S. At that voltage your going to need to run buck converters or something similar as most inverters and other 12v items are not going to do well with that high of a voltage. Now you also have to deal with converter efficiency and possibly several in parallel to handle a high current circuit. 3S you lose capacity as the voltage drops too low with a lot of cell capacity left. Even worse if you are smart about your pack and only charge to 4.0 volts likely extending the total charges a battery will take. I think the Lithium iron phosphate fits the 12v solution best even though they are not as energy dense as other chemistries.
I have inverters that will charge lipo batteries perfectly! I have 6kw and 12kw inverters that charge at 25v and 50v. So they will charge a 6s or a 12s power wall perfectly. They are great for the Tesla model S battery modules. I have a video coming up about them.
@@WesThatTechGuy any quality inverter will charge lipos. As long as they have settable disconnect voltage and max charge voltage. What is the cost of your inverters? Also are they 120v only or are they 240 2 phase?
lipo should only be charged with CC and CV and not all lead acid inverters can do that. Also most inverters are only set for lead acid batteries so they will only charge to 14.4-14.6v on average at best. Some inverters will actually throw 16.7v (which will fry any lipo pack or LFP pack) until the pack reaches a sustained load of 14v then float to the 14.4v area and then 2x that for 24v and 4a that for 48v inverters. My solargeni 6kwli-i inverters are built for lithium batteries and have the correct charging algorithim for lipo and lifepo4 batteries. 6s needs 25.2v max and 12s needs 50.4v max. so the telsa model s modules are a perfect marriage for these new solargeni inverters as well as a diy 6s or 12s telsa power wall. They will be posted over on westhattechguy.com and solargeni.com in the next few days.
i want to do solar + lifepo4 power wall but i dont want to deal with permits and inspections and shit. no way to stick solar panels on the roof and not have anyone notice either.....
Brian Ogram it’s not LED hum it’s actually come from the camera to the mic, we used one of the cheaper Rode mics and it did that. Battery was dead in my good Mic. But thanks for noticing and pointing that out.
depends on the application. Safest is the headway cell LifePo4. It won't explode or start a fire. The Lipo will take 4+ cells to equal 1 Headway cell. The lipo will still be a bit lighter in weight.
I have 2 lifePO4 12v 8Ah I bought the first of this month. I bought a charge you have to set type of battery number of cells, voltage, etc. I tried to see the charger work. When I hook either battery up and try to start the charge I get a cell warning on both and no charge. My other charger gives me a cell balance problem. What do you think? I just got one of the Miady 20ah batteries today. The charger is at my office so haven’t had a chance to try it with either charger.
check the voltage of each group of cells. you have 4 groups in your battery. they should be anywhere from 3.2v-3.65v. Also if your balance leads are connected wrong this could pose a problem. Good luck
Thanks for video and a lot of information, I'm building a 4s 1p 18650 battery pack for a drone my skyrc charger has settings for either lipo or life battery can I use it to charge this 18650 pack. Thanks again
Thanks for watching! Yes you can just put it on Lipo setting. Full charge should be 16.8 V. Nominal voltage is 14.8. Just set it for 4s
Once Lifepo4 Batteries are Fully Charger, I have been Told that you Do NOT want to Float them ( and IF YOU DO, to do so at 13.20 Volts --- so No more Current flows into them).
Subscribed and liked! Also one question, can you use lifepo4 charger on lithium-ion cells? With same voltage ratings?
Thanks! short answer NO. Long answer as long as charge voltage doesnt exceed the battery voltage you could. They both charge with CC/CV and are the same charger but with different voltage output. Li-ion is a 3.7v nominal and LifeP04 is 3.2v nominal.
If I was gonna build a lifepo4 battery for a trolling motor. 24 pound thrust id like a a 100amp hour what should I buy to make said battery???
I would use 44 or our 38120HP cells that would give you 96ah and a 1100a continuous discharge.
Brilliant I love these BATTERY’S and you’re right don’t buy old sells ✊🏿
thanks. and agreed!
Only five minutes in. . . Awesome! Saving this video!
Thanks! More coming. Be sure to subscribe to get the newest videos and I have a new one coming today about the battery chargers.
Just bought 4 of the 38120s LiFePo4 cells from you. Im going to try to use them for a portable 300w monolight setup for my photography, still waiting on some things to come in. what do you suggest for a good BMS and charging system for the LiFePo4 batteries configured in 4s?
Thanks for the purchase! get one of our 4s 60a LifePo4 BMS's and a s120 4s LifePo4 charger will do the job. Thanks for watching.
Great Job Wes! Very Detailed and Very Helpfull!!!
Thanks bro. Good to see ya again! How ya been?
trying to shake my last bout of sickness, this time I lost 100lbs in 2 months. But feeling better everyday and I can't wait for you to get your tail down here.....I see some good opportunitiesfor both of us once you do!!
What happened bro?
Same old Same old! My Health has been shot for the past 8 years and sometimes it catches up with me. Last time it took me down to 160lbs, this time I went from 280, to around 180. But I am feeling a little better every day!
Sorrry to hear it bro. I got your email
Awesome video, very descriptive. Ive heard lithium ion cells can exceed 1000 cycles is this true? Im asking because i have an bike using lithium ion, i do charge to 4.168v per cell but i never run it lower than 25% soc do you think id be able to come close to that number of charge cycles? I never charge them higher than the given voltage and most of the time i dont run lower than 50% to try and prevent deep discharge
To be specific the cells im using are lithium ion cobalt
Thanks. yes some can but most can not. that said even thought they can that doesn't mean they will last long at even 400+ charge cycles. if a new one lasts say 1 hour charged to 4.2v after 200-300 charges they will only last 15 mins say. Hope this helps.
@@kristianwhiskin1070 These are usually rated around 500 cycles. Yes, you can exceed 1000+ cycles if you keep them in a smaller voltage range when you use them. Only charge up to 4.1V per cell or lower. Only discharge down to 3.5V per cell or higher. This will decrease your range. Parallel with another battery pack to increase your range. Also VERY Important....Do NOT charge and let them sit around, it is best to charge and then use the battery pack. If battery packs sit, it is best if the cells are at about 3.8V (slightly charged) when not used.
great video!!!....my understanding is LiFe batteries should NOT be charged at the standard rate as LiPo's ...but should be charged at at a much lower rate...example: I have been charging my LiFePo4 1700mah at a charge rate of 1.7 amps ( 1C ) ...is this incorrect and too high... what is the recommended charge rate formula for a 1700mah LiFe battery ?....I use this for my receiver in a RC airplane....thanks
Charge rate varies from battery to battery. Find out what brand and model you have and determine from there. 1 samsung can take 20a charge while another might only take 3a charge.
hi great video..so by my understanding the headway batteries would be the best for a 48v 2000 watt go kart?..15 in series..also what is the difference in the headway hp batteries?..checked your shop and prices look good ..whats the best charger for these batteries..again thanks for the great advice and awesome videos!!!!!
Thanks carlos. The difference between them is standard headway 38120s is max 100a continuous discharge and 200a pulse at 10ah per cell and the HP is 200a cont. at 8ah. I don't have a 15s Lifepo4 charger but can order you one up on my next shipment if needed. Let me know.
your a champ!! will let you know :)@@WesThatTechGuy
I have a question what volt would a 6.4v lifepo4 be at fully charged and empty it a 10000 mah 4n 64wh looks like an 8 cell pack cheers lee
lee riley 7.3v charged. Empty or at 100% DOD it would be 5v.
Which one is better
I need power packs for my 6v game cameras and security cams. I am using four LiFePo4 6Ah wired in parallel for a total of 24Ah. They are charged with a 10W solar panel and a buck converter set to a maximum of 3.6 volts. For 6v I use a variable input boost converter set to an output of 6.1 v. The boost converter shuts down at about 2.5 volts and the internal batteries in the cams take over. With this setup the batteries cannot be over or under charged. They are working well. Without any sun the batteries will be good for about 45 days at the rate my cams are used. Seven+ hours of full sun will provide about 25% charge.
Interestingly with the panels I use I’m getting about 20mA+ during cloudy/hazy days. That does help a little to extend the usage. At full sun the panels put out 800mA. No balancing circuit is necessary!
Sounds really cool. I like the way you are doing this. We do have Lifepo4 packs or cells at SolarGeni.com
great video. what is the amps of a 4s 0p lifep04 pack assuming each cell is 10a?
Thanks! 100a per cell, so 100a @ 4s and 10ah. When wired in Series voltage increase but AMPS stay the same.
brain fart answer is 10a! series amps stay the same.
sorry I was thinking about the headway cell. yes if you have a 10a battery in 4s its 10a. yes series amps stay same voltage increases. parallel amps increase voltage stays the same.
Best video yet, great job Wes
Glad to hear it! Thanks Mondo!
Hey Wes, I appreciate your UA-cams. Can you help me; how would I calculate the reserve capacity of LifePo4 Batteries, whether in Series or Parallel configurations? How would I calculate the watt hours of these batteries?
jehovahstool thanks. You would have to have the proper charge and discharge charger to tell you these exact numbers of ah compacity but even then they could be the same new as they are in 3 yrs of use. The only true test is at full charge how long will they hold it and how long to deplete it under load. wh is volts x amp hours = wh
What is the safe discharge voltage for the 18650 without sacrificing charge cycles? I purchased a 72v bike with 80ah. The charger they gave me charges it to 88v instead of 84v. For some reason the battery BMS shuts down at about 72v. The controller also draws 600amps peak and has a constant current of about 350 amps. When you twist the throttle hard when the battery is low, im guessing the voltage sag is shutting off the BMS to the battery. Just trying to figure out safe low voltage for single cell or for the whole 72v pack. Thanks
how is your pack built? Meaning how many Series and how many parallel? what bike is it and what battery pack and charger is it from the company? This will better help to answer your question. Also do you know for sure the pack is built with 18650 and not prismatic cells?
hi.my girls mum has a headway superlight ebike.it hasnt been used for a while last year she said but battery seems very low i dont have charger but its kettle plug type but could i charge with my power supply 30v and a drok adjustable cc cv method say 2 amps at 28v for the 24v -lifepo4 8 cell i think pack.steve in uk
i couldnt get battery off bike but can get top of battery off to charge.if cells are dead can you revive these?
yes that will work. Max voltage is 29.2v so 28 will get them going.
yes you can jump start the cell. hit it with say 12v and 20a for just 1 second. check the voltge before you start. If below 2v jump them. do NOT keep the high voltage on the cell for more than a second or 2 max. do this until the battery starts to show higher voltage up to 2.5v than charge it up from there with a standard 3.65v. If doing the whole pack it's a bit more tricky.
@@WesThatTechGuy all cells are 3.7v now i stripped it to charge im rebuilding now
What company do you buy your Headway batteries from?
I buy direct from the specific manufactures that make the batteries. I buy them in bulk and ship by shipping container.
@@WesThatTechGuy Are you buying from Headway? I got in touch with them, no reply so far.
I buy my headway's from them yes.
@@WesThatTechGuy Do you buy direct from their .com or from Alibaba.
ROBERT FRIEND neither I buy from the company itself. I do not use Alibaba and I do not use a website that they have. the website they have is informative only you cannot purchase from it they don’t have an online store. They are a extremely large battery manufacturer and they don’t do Internet sales. They sell to wholesalers and distributors only that re-distribute the batteries. If you’re not buying batteries by the thousands or tens of thousands and as a wholesaler or as a distributor, you're better off finding a Headway distributor to sell you those batteries. Good luck Robert.
And in a evlead acid is like dragging a anchor behind you!
Right! I know!
Hmm... Hello! Just wanna ask when charging, what will be the constant current of a lifepo4 battery 5500mah? Thanks!
Most likely between 2500 ma (0.5C) and 5500 ma (1C) check the mfr specs ...
Was on your website, still doesn’t show the chargers.... last remark was that you guys would have them this week....(edit) shows ebike chargers... that’s about it for “chargers”
They are live now? go to westhattechguy.com, go to the online store and click on Battery Chargers
great explanation of battery's
Thanks Robert
Batteries
I have noticed since I have went lithium. Lead acid is is like comparing two sticks rubbed together compared to a match! I'm waiting for the battery equal to a zippo!
LMAO! I agree. I love my lifepo4 and lithium power walls and ebike batteries. No comparison to AGM or SLA batteries.
I want to build a trailer battery is there a type of automatic shut off when the voltage gets too low that I can buy for the Lipo batteries
Yes ...
Another thing about used or nos cells . you don't know if they were stored properly. In a hot of cold storage for years. Hurts the usability and degradation can take the useful life!
Exactly right James!
I don't see the chargers on your site .
@Brent Budd, Yes they are there now. We had to start adding them last night and today. I have several models, voltages and amperages up there now. Go check it out again. sorry for the delay. More will be listed tonight and tomorrow. Thanks for watching and checking out the site.
had to pull them until the new shipment arrives. hopefully this week.
I like your great educational vid.
Hi
I have the EMMO GT80 scooter with 80V/20Ah Lead Acid battery. i want to upgrade.
I want to build a (LiFePO4) battery pack that will equal 80V, 20AH.
1 or 2 or 4 batteries
Whichever is the best and Economical way
can this be done?
80V/20Ah (LiFePO4) battery
or
2 x 40V(LiFePO4) battery =80V
or
4 x 20V(LiFePO4) battery =80V
(STANDARD lithium-ion batteries WILL WORK FOR ME ALSO ... WOULD BE CHEAPER)
Thanks
very informative vedio good grate jub.. sir
I've do ok buying used 38120 cells. You just have to understand they are in fact USED. Do your testing. Test them for Self Drain issue. Internal Resistance. Test them for Capacity verses Rated Capacity. Buying used was the only way I had to buy LeFePo4 in the numbers I needed. If the cell holds a charge for a few weeks. If the cell meets it's rated capacity. The cell is going to last you longer then any Lead Acid.
IF you get a GOOD used battery it can last longer than lead acid yes, however unless you know the age and actual use of the cell you could be throwing away your money. Sometimes you get lucky. Used is used at the end of the day and if you need to depend on it than I prefer new every time when it comes to battery cells. A LifePo4 cell should hold charge for months not a few weeks.
@@WesThatTechGuy A few weeks works for me. In a active system they will never go down. LOL I'm Broke. Only way to get the job done. In the military I maintained more then a few 2000Ah Battery banks. Lead Acid is a pain in the rump to keep up with.
@@pulesjet I totally get it. These cells are not cheap!
@@WesThatTechGuy Actually your prices are better then fair. You can order then From China for like $10.0 a peace but then they hit you with shipping cost three times what you pay for the cells. Crazy stuff.
Yes we are fair on pricing. that's correct shipping, import fees and duties make them more than I'm selling them for. Our prices will only go up due to tariffs, supply and demand. We lowered them for a few but will be going back up to the $20 and above price soon.
I'm going to be building a very large battery bank with an inverter with used 18650 cells, I'll be building them in interchangeable blocks and it will have a voltage monitor on each block to see if it drains fast or self discharges, it will also be a ebike battery although it might be a bit bulky. I'm getting all the cells for free and wouldn't buy new anyways because I think it's too expensive even if it was 1$ per cell
Sounds great! good luck.
Sir I have 5 lifepo4 batteries of 3.2v 6000mah each.connected all in parallel got 3.2v 30000mahn .so will you please tell me how voltage should be apply to it to get full charge or is there any pcb board available to charge it please tell me......
3.65v on the positive and negative lead
will discharging my lipo to 3v everyday damage it? I only charge to 3.92v to 4v everyday
3.0 Volts for a LiPo cell seems quite low ...
Would have been nice if you’d explained that the 12V lead acid cell was actually 6 cells in series internally. I love the headway cells but @ 75c a watt hour they don’t make a lot of sense in large applications. You can get them cheaper but you have to ask yourself why go to all that trouble when a PW2 includes cooling, charging, bms, inverter and sophisticated monitoring for less.
Next time if I can remember MondoTV. I would always prefer what I build over mass produced All-in-One PW2 or equivalent. It would cost me in the $18k range to get what i have from them and it still wouldn't be close. If one thing goes wrong with the PW2 then the whole unit is out of commission. I would love to have a couple of them but this makes more sense for me at this time. Thats my inverter battery combo I currently have in my home... 12kw inverter, 36kw of battery storage.
Wes That Tech Guy Certainly the Headway cells should give you a lot more cycles.
What other low voltage/current applications could use this approach? See next comment.
25.2v is where these batteries can be combined in parallel. This includes nicd. This is nom voltage.
yes 25.2v is a 6s build for lipo cells.
@@WesThatTechGuy this includes lifepo4, nicd, lead acid, and li-ion. The problem with this voltage is end product designs.
Seems to me to get the most out of Lion battery capacity you need to go 4S. At that voltage your going to need to run buck converters or something similar as most inverters and other 12v items are not going to do well with that high of a voltage. Now you also have to deal with converter efficiency and possibly several in parallel to handle a high current circuit. 3S you lose capacity as the voltage drops too low with a lot of cell capacity left. Even worse if you are smart about your pack and only charge to 4.0 volts likely extending the total charges a battery will take. I think the Lithium iron phosphate fits the 12v solution best even though they are not as energy dense as other chemistries.
Chris that is correct on all counts!
If you go to 24v it's closer with 18650 but at 48volts 18650 line up perfect with let acid inverters
I have inverters that will charge lipo batteries perfectly! I have 6kw and 12kw inverters that charge at 25v and 50v. So they will charge a 6s or a 12s power wall perfectly. They are great for the Tesla model S battery modules. I have a video coming up about them.
@@WesThatTechGuy any quality inverter will charge lipos. As long as they have settable disconnect voltage and max charge voltage. What is the cost of your inverters? Also are they 120v only or are they 240 2 phase?
lipo should only be charged with CC and CV and not all lead acid inverters can do that. Also most inverters are only set for lead acid batteries so they will only charge to 14.4-14.6v on average at best. Some inverters will actually throw 16.7v (which will fry any lipo pack or LFP pack) until the pack reaches a sustained load of 14v then float to the 14.4v area and then 2x that for 24v and 4a that for 48v inverters. My solargeni 6kwli-i inverters are built for lithium batteries and have the correct charging algorithim for lipo and lifepo4 batteries. 6s needs 25.2v max and 12s needs 50.4v max. so the telsa model s modules are a perfect marriage for these new solargeni inverters as well as a diy 6s or 12s telsa power wall. They will be posted over on westhattechguy.com and solargeni.com in the next few days.
Hi subscribed straightaway great help
@Colin Fox. Thanks and glad you like it!
Great information!
TY Matt!
well said thanks
i want to do solar + lifepo4 power wall but i dont want to deal with permits and inspections and shit. no way to stick solar panels on the roof and not have anyone notice either.....
put the panels on a pole or the ground and just get a simple electrical permit for the hookup of the power wall to the main AC panel.
Why are we comparing lead acid with a title that says lifepo4 vs Lithium?
I think it gives us a sense of comparison between the other two to know the most common 12v battery.
Great video man!!!
Thanks alot man
You're Welcome bro!
Thanks Wes
Lifepo4 = lithium iron phosphate .
Yes that is correct! I assume your asking not stating?
Next purchase should be a mic that doesn't pick up the LED hum.
Brian Ogram it’s not LED hum it’s actually come from the camera to the mic, we used one of the cheaper Rode mics and it did that. Battery was dead in my good Mic. But thanks for noticing and pointing that out.
Ever heard of LTO cells?
Yes, great cell but VERY expensive!
Aren't the the 18650s lithium ion not lithium polymer?
no, they will not catch fire, even when disassembled and exposed to water. Another kind of Lithium. Sorry, i cant explain in english 🤷🏼♂️
@Kristian Yes, both get charged the same way. Both are dangerous if mistreated, LiFePO4 is much safer.
the title is,"LifePO4 VS Lipo", but nothing in it about lipo,[RC] batteries.
Sorry not sure what you mean but what is it that you're looking for? Maybe I can help.
Which one son?
depends on the application. Safest is the headway cell LifePo4. It won't explode or start a fire. The Lipo will take 4+ cells to equal 1 Headway cell. The lipo will still be a bit lighter in weight.