Samsung Galaxy S4 Spare Battery Charger (2600mAh Battery Included) (Discontinued by Manufacturer) Samsung Galaxy S Spare Battery Charger (2600mAh Battery Included) If your phone is running low, simply swap out your dead battery for your new one. Go from 0% power to 100% power in seconds. Great when you battery is low but you need to continue using your device and don't want to be attached to a wall outlet Compact Charging and Carrying Case for Spare Battery Micro USB Travel Adapter (700mAh) Also Charges Micro USB Compatible Mobile Devices