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'- Board TP4056 lithium charge management chip - Mini USB head can link directly to the computer USB port charging - The charging board can also power supply from (IN and IN-) pin - Setting aside the the TEMP pin interface can be used as lithium battery temperature detection - Input voltage: 4V~8V - Maximum output charging current: 1000mA - D1 indicator lights on when in charging, D2 lights on when charging completed - English Manual/Spec: Yes - Great for DIY project