CELIO&reg; 2600mAh Portable External Backup Battery Charger USB Power Bank for for All Smartphones & Usb-charged Devices (Apple Iphone, Ipad, Ipod, Adroid, Samsung, Htc, Android, & Kindle) (Blue) 100%Brand New ,High Quality , High Transfer Efficiency Low Resistance and Energy Saving Built-in efficiency battery model 18650: 2600mah Input: 5V 0.5A. Output: 5V 1A. High security with charging and discharging control, short circuit protection