... -in green, safe rechargeable lithium polymer battery, charging your mobile phone, digital camera, PDA, PSP, mp4, MP3, IPOD and other ... anywhere, eliminating no power.SpecificationCapacity of built-in lithium polymer batteries: 4,000mAh/3.7v Input Voltage:DC5.0V±0. ... the product:about 4 hoursCycle life: >500 times Applications: mobile phone, as Motorola, Samsung, Sony Ericsson, Siemens, LG, MP3/MP4, ...