KKmoon Micro USB 5V 1A Lithium Battery Charging Board Charger Module 5V 2A Li Lon Battery Protection Module Charge Discharge Controller ( Item#: E17031 )

Suitable for controlling the charge and discharge of a single lithium cell. High quality electronic material, well-made for long term use.

Features: 
Lithium Charging Module - input with micro-USB female head, you can directly input the rechargeable lithium battery connected to the mobile phone charger. And still retain the input voltage of the pad, can be very convenient for DIY. Charging cutoff voltage: 4.2V +/- 1%; Maximum charging current: 1000mA.
TP4056 Charging Module - input voltage: 5V; battery overdischarge protection voltage: 2.5V; battery overcurrent protection: 3A. Connect the battery to B + B- and insert the USB master phone charger. The red indicator means charging and the green indicator means full. When charging, disconnect the load OUT terminals on the positive and negative terminals. Please follow the specifications, otherwise it will be damaged directly.
2A 5V Charge Discharge Integrated Module - For MCU users, if you accept a small load, the Key can be connected to the microcontroller in about 20 seconds to provide a low level to allow the module to continue working. Trigger mode: low level trigger (ground). 4 in 1 charging/discharging/lithium battery protection/battery power indicator module. Lithium battery protection function: over current, over voltage, over heat, short circuit protection.
If the load is less than 50mA, the output will automatically shut down after 30 seconds. Otherwise, the output will be turned off automatically. If the load is greater than 50mA, the output will be turned on automatically. Discharge is allowed while charging. (Note: the output voltage is 4.7/5V).

Specifications:
Material: Electronic material
Color: Blue
Item Size: 2.9*1.7cm / 1.14*0.66in(charging module);
2.8*1.6cm / 1.1*0.62in(protection module)
Package Size: 11.5*7*0.5cm / 4.52*2.75*0.19in
Package Weight: 20g / 0.7oz

Packing List:
5 * 1A Charging Module
5 * 2A 5V Charging Protection Module