The battery is thick! The lid is not covered
For the usual lithium batteries, to keep at room temperature conditions, to avoid light and overheating environment once the battery used to deformation, drums, etc. must be even if the treatment can not be forced to use.
It is best to replace the battery pack immediately, a serious drum may cause the battery to explode.
You this is the battery drum bag phenomenon. This may be the purchase of a poor battery, the protection circuit design is not good, or the use of a poor charger caused.
