Incipio offGRID Power Bank, Dual USB Port Charging [8000 mAh] Portable Backup Battery Pack Device Charger, 2-Port - Black 8000mAh rechargeable battery USB output ports Micro USB input port High current and fast speed charging Compact and portable design When at full capacity, the offGRID Portable Backup Battery 8000mAh can fully charge an average smartphone 4-5 times Rechargeable lithium-Polymer battery with 8000mAh capacity Total 3.1A (2.1A +1A) max output for charging tablets, smartphones, and other USB devices