Rapid Charge 3x Power Bank | Backup Battery for Phones and Mobile Devices (Electric Blue 6000 mAh) The bPowered Up 3x power bank battery has enough juice to fully charge 3 standard cell phones. Compatible with iPhone, Android, and other standard mobile devices such as tablets. Two charging slots for normal (1 amp) and rapid charging (2.1 amp). Can charge two phones at the same time. Dimensions: 5 in x 0.5 in x 2.75 in Easy to use. Just power it on and plug in your phone. LED lights tell you how much charge remains in the power bank.