5 PCS LANTIAN 4 In 1 2.1A 4.2V Charge Discharger DC-DC Boost Converter 3.7V to 5V UPS RC PDB Board

5 PCS LANTIAN 4 In 1 2 1A 4 2V Charge Discharger DC DC Boost Converter 3 7V to 5V UPS PDB BoardBS301CV is a multifunctional 3 7V 4 2V Mobile Power Diymodule 3 in 1 Function charge discharge and battery protection It is very suitable for DIY mobile power Specification Brand name LANTIANItem model BS301CVCharge voltage DC 4 65V 5 5VCharging current 0 2 1A Charge quiescent current 100uAFull charge voltage 4 2V 1 Discharge current 0 2 4A Discharge quiescent current 50uADischarge conversion efficiency maximum 96 Output voltage 5VOutput current 0 2 1A Operating ambient temperature 20 to 85Size 25 2 x 16 x 4mmWeight 2gComes with battery protection do not need battery protection board if your battery comes with a protective board it does not matter Overcurrent protection OCP Overvoltage protection OVP Short circuit protection SCP Over temperature protection OTP Button mode The button duration is longer than 50ms but less than 2s which is a short press action Short press will turn on the battery indicator and boost output The two consecutive short presses within 1 s will turn off the boost output and power display Pin description 1 VIN Charging port 2 GND Charging port 3 GND Battery port 4 BAT Battery port 5 GND Output port 6 VOUT Output port 7 KEY Output trigger port Low pulse trigger 1 In discharge mode In the charging mode the KEY function is invalid the KEY Trigger once turn on the output Continuous trigger twice