Romoss PPB10 10000mAh 22.5W Polymos 10 Air Fast Charging Power Bank - WhiteRomoss PB10F Polymos 10 Air 22. 5W Fast Charging 10000mAh Power Bank Fast Charging and Efficient Output: Fast charging of only 3. 5 hours, the power output conversion rate improved to 85% Dual USB and Charge while discharge: charge 2 mobile devices at the same time and can be charged and discharged simultaneously, Compatible and Smart: automatically adjusts output based on the connected device, compatible with all popular smartphones and tablets