Milwaukee M18 Battery Not Fully Charging, FIXED!

If you have a Milwaukee M18 battery that does not fully charge (non-Forge), but can still power a tool, chances are you can fix that pretty easily. All you need is this video and the following supplies:
1. T10 and T-9 Safety Torx
2. Multimeter or Voltmeter
3. Alligator clamps/leads
4. TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module
5. Ability to solder for the charging module

[@sandyconnolly2420]

Worked! Saved me from having to buy a new battery. Excellent content. Thanks again

[@IllInformedHuman]

Thank you for confirming!

[@sandyconnolly2420]

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!

[@IllInformedHuman]

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.