Multi-purpose Battery Pack smart shape Multi-purpose Battery Pack Parameters:Input: DC5.0V/650mAOutput: DC5.4V/500mALithium polymer Capacity: 3.7V/4000mAhSize: 100x63x13 mmWeight: 135gCycle Life > 500timesSelf-discharge <0.05mA.Charge State: 4 LED display capacityApplications: Mobile phones Nokia, Motorola, Samsung, Sony Ericsson, Siemens, LG and MP3/MP4, PDA, PSP, i-PD, etc.