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[00:00] - Why is the battery not charging (cell balancing)
[02:52] - Find defective cells
[12:46] - Defective cell charging
All products that use lithium-ion batteries will lose cell balance during use due to the nature of the battery. If you take quick action, you can use it normally.
If the battery charger is not fully charged, the cell balancing may be wrong. At this time, we made a video on how to check the cell balancing status and take action.
This method can be applied not only to charging tool batteries but also to other lithium-ion batteries such as vacuum batteries.