Board TP4056 lithium charge management chipMicro-USB head can link directly to the computer USB port chargingThe charging board can also power supply from (IN + and IN-) pinSetting aside the the TEMP pin interface can be used as lithium battery temperature detectionInput voltage: 4.5V~5.5V Full charging voltage: 4.2VWorking temperature: -10'C-85'CMaximum output charging current: 1000mA