The Xssive wireless power bank W3N has a high quality copper core, low energy loss and is compatible with a wireless adapter. This backup power supply is mainly designed for charging portable digital devices and built-in rechargeable Li-ion polymer battery as energy storage. It has the function of constant voltage and current limitation. Thanks to the high capacity of 10000 mAh, you can charge most smartphones about two to three times. This wireless power bank has a life cycle of up to approximately 1000 charges.