5Pcs BS301CV 4 in 1 2.1A 4.2V Charge Discharger DC-DC Boost Converter Power Supply Module Board

Feature 1 BS301CV is a multifunctional 3 7V 4 2V Mobile Power Diy module 3 in 1 Function charge discharge and battery protection 2 It is very suitable for DIY mobile power 3 Comes with battery protection do not need battery protection board if your battery comes with a protective board it does not matter 4 Overcurrent protection OCP 5 Overvoltage protection OVP 6 Short circuit protection SCP 7 Over temperature protection OTP Specification Charge voltage DC 4 65V 5 5VCharging current 0 2 1ACharge 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 1AOperating ambient temperature 20 to 85Size 25 2 x 16 x 4mmWeight 2gButton 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 The method of operation 1 In discharge mode In the charging mode the KEY function is invalid the KEY Trigger once turn on the output Continuous trigger twice turn off the output 2 When the load access it will automatically turn on the output But if the load is less