First thing u will notice on opening the package is that it is triple times the weight of ur phone it writes 7800 mA and has 3 led displaying its capacity. i plugged my phone from 37 % battery with pny charged 100%.in about an hour its first led was off and my s2 (1650ma battery) was charged only 58%. PATHETIC. I WISH THERE WAS AN OPTION TO RETURN THE PRODUCT. MOREVER I DONT THINK PNY IS HAVING ANY CUSTOMER CARE CENTER IN INDIA. USELESS PRODUCT SO FAR