Hello. I am having problem with charging this 4500mAh build-in battery ( 3 pieces 1500mAh batteries in series -usb charging). I was charging it for more than 10 hours (in manual its said it should be charged in 3 hours with 1.5 A) with my iPad 2 charger which charges at 2.1 Amps and 5.1 Volts The battery still flashes Red. I dont understand why, when I put my clearomizer on the box mod and hit the fire button it says low battery although that battery is full
Edit : As u can see