Driving any fastener can put put of wear on batteries fast, the current requirements are high and peaky. Nails are particularity bad because unlike say, driving a screw or bolt you often don't even give they battery a second or two of break time to cool slightly while you line up your bit to the next fastener, just "BAM BAM BAM" down the line of wood as fast as you can until you drain the battery back to nil.

This is one of the the best ways to kill li-ion cells fast.