1, Polymer Lithium-ion battery: 2800mAh/3.7V , 2.special universal solar power pack 3.LCD screen indicate capacity It is a ... you are charging and discharging. Specification: 1, Polymer Lithium-ion battery: 2800mAh/3.7V , high energy and safe. 2,Intelligent capacity ... . 8.68mm*48mm solar panel can reach 100ma current power under the sunshine. 9, 2800mAh Capacity buildin battery can charge two times ...