※. Product size: 107mmX79.3mmX16.1mm; Fully aluminum materials , cool metal feel ※. Widely used for different electronics charge,like Mobile/GPS/MP4/IPAD /IPHONE/Camera ※. Fit for outdoor workers and travelers emergency battery charge,with 3900mAH/4500mAH/4800mAH/5200mAH/8800mAH capacity for choice. Green environmental protection Li-polymer battery pack inside ※. Provide battery safety certificates,provide the third party liability insurance ※. Battery type: Environmental protection Li-polymer is the most safety battery in the world now,never explosion,high transfer efficiency,lower heat release