Sell 2A 5V Charge Integrated 3.7V 4.2V Lithium Battery Boost Mobile Power Module best price

MCU users, if you accept a small load KEY can be connected to the microcontroller about 20S to give a low level allows the module to continue working! 4-in-1 Charging / Discharging / Lithium Battery Protection / Battery Level Indicator Module In the discharging mode (the charging mode KEY function is invalid), the KEY port is triggered once and the output is turned on; the KEY port is triggered twice in succession and the output is turned off. The first time you access the load, the output is automatically turned on. If the load is less than 50MA, the output will be turned off after 30 seconds; if the load is greater than 50MA, the output will be continuously turned on. Allow discharge while charging (Note: Output voltage Greater than 4.7/ Less than 5V at this time)