USTOP&trade;White Square cylinder Lipstick 2600mAh USB Port External Charger Portable Power Bank Battery for Mobile Phone Droid, Google Glass, Nexus 4, Nexus 7, Nexus 10 LG G2 LG Google Nexus 5 Capacity: 2600mAh Cell: 3.7V/18650 Input: 5V/800mA; Output: 5V/800mA Charging time: about 5 hours Cycle life: at least 500 times