Taidacent 5V 2A Charging and Discharging Module 37 42V Lithium Battery Cells Charger Protection Board Boost Power Supply Board Differences between Standard Edition and Upgraded Edition Standard version, if the load is less than 50MA. The output will be turned off after 30 seconds: if the load is large_x000D_ At 50MA, the output will be turned on continuously._x000D_ The upgraded version will always output regardless of whether the load is connected or not, 5V normally open._x000D_ The customer chooses according to the actual application. _x000D_ Product Features Charging voltage: DC 4.5V-5.5V (DC5V recommended)_x000D_ Charging current: 0-2.1A_x000D_ Charging quiescent current: 100uA_x000D_ Full voltage: 4.2V±1%._x000D_ Discharge current: 0-3.5A;_x000D_ Discharge quiescent current: 50uA_x000D_ Discharge efficiency: up to 96%_x000D_ Output voltage: 5V_x000D_ Output current: 0-2.1A_x000D_ Ambient temperature: -20℃ to +85℃_x000D_ The module comes with lithium battery protection function (for lithium battery without protection, with protection board)_x000D_ Overcurrent protection (OCP)_x000D_ Overvoltage protection (OVP)_x000D_ Short circuit protection (5SCP)_x000D_ Over temperature protection (OTP)_x000D_ Charge and discharge power level 4 interval indication _x000D_ Usage When the module is charged, the output will switch to external power supply (the power will be cut off for 0.3s). The output voltage will be less than >47/k5V during charging, depending on the charger's load capacity!_x000D_ Trigger mode: low level trigger (grounded)_x000D_ For users who connect to a single-chip microcomputer, if a small load kEY is connected, the single-chip microcomputer can be connected for about 20s, and a low level can make the module continue to work _x000D_ Application Car charging transformation_x000D_ Driving recorder power supply_x000D_ Power Bank/Power Bank_x000D_ Portable devices such as mobile phones and tablets _x000D_ _x000D_ _x000D_