Do make sure it's finished indexing. That runs down the battery.
I think if the charging circuit was damaged it might not charge at all, or not stop charging and set the battery on fire. One KK3 behaved strangely and needed a reset a couple of times after replacing the battery.
If it does charge at all and run for a day it's most likely that either the SW needs reset or the battery (really a cell) is too old or been stored too warm. I was pleased than the DXG battery I ordered was only about 18 months old and one of the KK3 batteries was only a month old before shipping (which took 6 weeks!).
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