Charging accuracy: 1.5%
Input voltage: 4.5V-5.5V
Fully charged voltage: 4.2V ± 1%
Current: 1A adjustable
LED indicator: Red means charging and green means fully charged
Input interface: Type c
Working temperature: -10° to +85°
Reverse polarity: No
Battery overcharge protection voltage: 4.28V
Battery overcharge boost voltage: 4.00V
Battery discharge protection voltage: 3.0V
Battery discharge termination voltage: 3.2V
Battery: Overcurrent protection current 3a

Package include:
20 x TP4056 charging module

Note:
When the first time you access the battery, there may be no voltage output between OUT- and OUT +, at this time, get access to the 5V voltage, it will be activated
The ampere meter can only be connected to the 5v input terminal of the module
If you want to use Phone charger to charge, the current input should be up to 1A and more, otherwise it can not be in normal charged
The charging current is preferably 37% of the battery capacity. If you charge a 1000mAH battery, 400 current is enough
When the battery was get out from B + and B- , it still need to be charged then can be activated
The connecting wire should not be too thick
Make sure the connection point is good
The input voltage is too high, such as 5.2v, and the current is less than 1000mA, which is a normal phenomenon. With protection function, the charging current is automatically subtracted to avoid burning the chip