20000 mAh large capacity, can charge three devices at the same time.Portable to carry, does not take up spaceNo tools required, easy to install.15W wireless fast chargingCompatibility: Suitable for all mobile phones.Model#DLP7721CBattery type: Lthium polymer batteryBattery capacity:20000mAh @3.7VBattery cnergy:74WhRated input:Micro U58 DC5V/2A，9V/2AUSB-C DC 5V/3A，9V/2A...