noubco Wireless Charger Power Bank for Qi Compatible Devices - Black Combination of QI charging pad and 4000mAh power bank with 5V 2A USB port output You can recharge this without wires by using compatible QI desktop charger QI power bank can charge your smartphone once or twice (depending on phone types) with in-built batt High efficiency of 75% for wireless power transmission with in-built advanced lithium-polymer battery