mophie Juice Pack Powerstation Duo - 6000mAh Power Bank - Black (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90 Day warranty 6000mAh rechargeable power capacity Provides up to four complete battery charges for most smart phone devices. Ability to charge two devices at once Special high out battery that allows for ultra fast charging - Capable of switching between 500mAh, 1A, and 2.1A charge