2A 5V Charge Discharge Integrated 3.7V 4.2V Lithium Battery Boost Mobile has low level trigger (ground) and 4-in-1 Charging / Discharging / Lithium Battery Protection / Battery Level Indicator Module. The output opens automatically at the first time the load is connected. If you accept a small load KEY can be connected to the microcontroller about 20s to provide a low level allows the module to continue working. In discharge mode (The charging mode KEY function is invalid), trigger the KEY port once to open the output, continuously trigger the KEY port twice to close the output. The first time the load is connected, the output is automatically turned on. If the load is less than 50MA, the output will be automatically turned off after 30 seconds, if the load is greater than 50MA, the output will be automatically turned on. Allow discharge while charging.
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