... Weight: < 3.0kg Displayed informationRate, volume limit, accumulated volume, power indicator light, bed No., AIR, OCCL. OVER,EMPTY Alarm informationOVER ... 60 Hz BatteryRechargeable lithium polymer battery,7.4 V,1600mAh.Max. power consumption 25W, can run for 4h after being ... recharged. Battery rechargeWhen the pump is connected to the AC power supply, turn on the power and the battery will automatically ...