Ventisonic&reg; 5V 1A Micro USB 18650 Lithium Battery Charging Board Charger Module+Protection 100% Brand New Ventisonic 5V 1A Micro USB 18650 Lithium Battery Charging Board Charger Module+Protection. High quality Input port with micro USB female, can directly use mobile charger for input to the lithium battery,and still retain the input voltage wiring solder joints, can be very convenient. Connect the battery to B + B - , insert mobile phone charger to the USB Female then red light is charging and green is full of charged. The input voltage: 5V; Maximum charging current: 1000 mA; Charge cut-off voltage: 4.2 V + / - 1%; The battery overcharge protection voltage: 2.5 V; Battery over-current protection current: 3 A; Input interface: micro USB Package included: 1 x 5V 1A Micro USB 18650 Lithium Battery Charging Board Charger Module+Protection