4 In 1 Charger Discharger Boost 5V 2.1A Module for 3.7V 4.2V Battery DIY Mobile Power with Button

Descriptiontrigger input LOW grounding Single Chip Using If Small load KEY connect 20S single chip and supply with input LOW the module will work well Charge voltage DC 4 5V 5 5V Recommend DC 5V Charging current 0 2 1ACharge quiescent current 100uAFull charge voltage 4 2V 1 Discharge current 0 2 4ADischarge quiescent current 50uADischarge conversion efficiency MAX 96 Output voltage 5VOutput current 0 2 4AOperating ambient temperature 20to 85Size 25x16x4mmWeight 2 3gPCB board design Immersion GoldBattery protection OCP OVP SCP OTPAbout module pin1 VIN charge port 2 GND charge port 3 BAT Battery 4 GND Battery 5 GND output 6 VOUT output 7 KEY triggerNote 1 In discharging mode charging mode KEY function invalid trigger KEY one time output open trigger two times output close 2 Output will open automatically if you connect load If load below 50MA the module will turn off output port if load over 50MA output port will always open 3 Allow charging and discharging at the same time output voltage should below 5V Stop charging and stop discharging you should reactivation the module Package1x module1x button