Exogear Exolife Rechargeable Battery Case For Iphone 4
It does not make a difference if it is dead or actually. It should take max 3-6 hours to charge to full power even if you still have battery lead. There is a big difference in how long it will lastly. There is a standby mode when you are not using it which most phones last up to a few days 3 max. But if you use it a lot the battery will die a lot q