This UL Listed 4,000 mAh Lithium Polymer Grade A battery features with leatherette cover. Input: 5V/1000 mA; Output: 5V/1000 mA. Includes a USB to Micro USB connecting cable which can recharge the battery backup or be used to charge up devices with a Micro USB input like Android Smartphones from Samsung, Motorola, HTC, Nokia, and others. This product has passed UL standards.