Yea, at this point I would recommend staying away from the 8Ah and 12Ah unless you plan on using them professionally and plan to swap them every two years anyway.
I have a 12ah thats only been cycled a few times. I have a lipo charger and all the cell packs are over 4V now but i still only have 3 bars. The last time i used the pack on my leaf blower it went dead after about 10 minutes.
Thank you! With that 100mA charger, it takes about 45minutes to bring each cell voltage up by 0.1V. The 8Ah battery took a little over eight hours while the 12Ah took the same time, due to less cells being undercharged. Using a beefier charger would reduce the time drastically. Though, slower charging means a cooler cell, which helps preserve the battery life.
@@chriscoco547 After fully charging the pack (At least as high as it will let you) when you open it up and check each cell voltage, the ones that are closest to 4.2VDC would be the "good" ones. Unfortunately, the cells are tack welded onto a strip of metal during assembly at the factory, so harvesting them is fairly difficult and not advised.
A phone charger will always supply voltage, the phone decides when it stops accepting (Most common). Doing that to a raw battery cell will cause a thermal event. You need something that will monitor the cell voltage and turn off automatically.
it seems like half of Milwaukee's bigger batteries have this problem. Nice going Milwaukee.
Yea, at this point I would recommend staying away from the 8Ah and 12Ah unless you plan on using them professionally and plan to swap them every two years anyway.
Worked! Saved me from having to buy a new battery. Excellent content. Thanks again
Thank you for confirming!
I have a 12ah thats only been cycled a few times. I have a lipo charger and all the cell packs are over 4V now but i still only have 3 bars. The last time i used the pack on my leaf blower it went dead after about 10 minutes.
Sounds like the voltage drops drastically when a load is applied. Which means your cells are likely too far gone to be recovered.
I already have a cell balancer so now I know how to do it on my Milwaukee batteries . Good video!
Repair rather than replace, keep those darn things alive! Glad you found the video useful :)
Approximately how long does it take to charge each cell? And what is the output amp load max on your charger/power supply? Great video thanks!
Thank you!
With that 100mA charger, it takes about 45minutes to bring each cell voltage up by 0.1V. The 8Ah battery took a little over eight hours while the 12Ah took the same time, due to less cells being undercharged. Using a beefier charger would reduce the time drastically. Though, slower charging means a cooler cell, which helps preserve the battery life.
Wondering, if a m18 pack goes bad, is it possible to identify any remaining good cells and salvage them for use in another pack that has “bad” cells?
@@chriscoco547 After fully charging the pack (At least as high as it will let you) when you open it up and check each cell voltage, the ones that are closest to 4.2VDC would be the "good" ones. Unfortunately, the cells are tack welded onto a strip of metal during assembly at the factory, so harvesting them is fairly difficult and not advised.
Sorry. Perhaps a silly question... Could i just wire up a 5v phone charger and avoid buying the plug in doohickey?
A phone charger will always supply voltage, the phone decides when it stops accepting (Most common). Doing that to a raw battery cell will cause a thermal event. You need something that will monitor the cell voltage and turn off automatically.
Is this worth doing to a 1.5? Lol😅