This is the most powerful case out there. Your iPhone 4/4s comes with a 1400 mAh batter this charger keeps more than two full charges on standby for your iPhone 4/4s
Containing the high capacity of 3000mAh, the external battery case
for iPhone 4/4s will power up your phone to full capacity and prolongs its life. Now you
can use and play with iPhone freely with no worry about keeping power for
some important calls. Watch TV , videos, play games and do other activities without the worry of running out of battery power. You can use the stand to hold up your phone while it charges too! This product is lightweight and portable. With
rubberized surface, the battery case has a modern look.