Li-ion Battery Charger Module 

This TP4056 1A tiny Li-Ion Battery Charging Board with Current Protection. The micro USB connector on the board is to connect the charging cable, this board is perfect for charging single cells like 18650 3.7V or higher lithium-ion cells. You can use the 18650 single cell battery holder to connect the battery to the board. After the use you can store the battery in the battery safe guard bag. Based on the TP4056 charger IC and DW01 battery protection IC this module will offer 1A charge current then cut off when finished.

The protection IC will turn off the load when the battery voltage falls below 2.4V to prevent the cell from operating at an excessively low voltage. Other features include over voltage protection, reverse polarity protection, and current protection.

Note: 

• Connect micro USB cable for power, or 5V DC to pads marked IN+ and IN- on the left-hand side of the module
• Connect cell to charge to B+/B- pads on the right-hand side of the module.
• A load (something for the battery to power) can be connected to the OUT+/OUT- pads on the right-hand side
• Important! Disconnect load when charging
• The red LED indicates charging in progress, green LED indicates charging has finished.
• Never charge your battery at a rate greater than 1C.

Specifications:

• Charging accuracy (%): 1.5
  
• Charging method: Linear
  
• Full Charge Voltage (V): 4.2
  
• Over-Current Protection (A): 3
  
• Under-Voltage Protection (V): 2.5
  
• Input Voltage (V): 4.5-5.5
  
• Rated Power (W): 4.2
  
• Operating Temperature (°C): -10  to 85

Package Includes:

• 1 x TP 4056 Li ion Battery Charger Module With Protection