I just got my (very first) set-up yesterday, put the battery onto the usb charger, the plugged the charger piece into the wall plug, then the wall plug to extension cord already plugged to wall socket.
Battery flashed as per directions, and little red light came on...I left the battery charging for 2 hours and noted it seems to "talk"
the little light on the usb charger blips from red to green, back to red, green...rather quickly...I choose to leave the battery plugged in for the complete charge and it seems to be just fine. The second battery I left charging for over 4 hours, simply because I forgot about it, LOL
Is it possible some folks are seeing the flash of green as it is charging and think its ready to go?