mophie Powerstation 6.2K (6,000 mAh) - Space Gray (Certified Refurbished) With enough battery to recharge a smartphone up to two times, this powerstation battery is also designed for users who need to power multiple devices. Enables pass-through charging while connected to a power source. Your device recharges first, and then the powerstation battery recharges itself. 2.1A output and smart adaptive charging technology identify your connected device and always deliver the fastest, most efficient charging speeds available. High-performance power concealed inside a sophisticated and sleek design make this the perfect accessory for any mobile lifestyle.