... tips if required.This product is a multi-function digital mobile power, built-in green, safe rechargeable lithium polymer battery, ... other digital product charge anytime and anywhere, eliminating no power.SpecificationCapacity of built-in lithium polymer batteries: 4,000mAh ... of the product:about 4 hoursCycle life: >500 times Applications: mobile phone, as Motorola, Samsung, Sony Ericsson, Siemens, LG, ...