This module is made for charging rechargeable lithium batteries using the constant-current/constant-voltage (CC/CV) charging method. In addition to safely charging a lithium battery the module also provides necessary protection required by lithium batteries.

This module uses the TP4056 / TC4056 Li-Ion charge controller IC and a separate protection IC. There are other types of modules on the market that use the TP4056 / TC4056 but lack any protection circuits or ICs to provide the necessary protection needed with lithium batteries. This module uses both the TP4056 / TC4056 and the DW01A Li-Ion battery protection IC, which together in combination provide the following protection features:

• Manage the constant current to constant voltage charging of a connected lithium battery
• Over-discharge protection - keeps your battery from being discharged below 2.4V, a healthy minimum voltage level for your battery 
• If a connected battery has been discharged below 2.4V the module will cut output power from the battery until the battery voltage has been re-charged above 3.0V (the over-discharge release voltage), which at that time the module will again allow discharge of power from the battery to a connected load. Although the module cuts output power from the battery during an over-discharge situation, it still allows charging of the battery to occur through the parasitic diode of the discharge control MOSFET (FS8205A Dual MOSFET).
• Overcharge protection - the module will safely charge your battery to 4.2V
• Overcurrent and short-circuit protection - the module will cut the output from the battery if the discharge rate exceeds 3A or if a short-circuit condition occurs
• Soft-start protection limits inrush current
• Trickle charge (battery reconditioning) - if the voltage level of the connected battery is less than 2.9V, the module will use a trickle charge current of 130mA until the battery voltage reaches 2.9V, at which point the charge current will be linearly increased to the configured charge current.

Specifications:
Model Number:796431
Product Name: Charging Board
Condition:100%
The Input Voltage: 5V
Maximum Charging Current: 1000 mA
Charge Cut-off Voltage: 4.2 V + / - 1%
The Overcharge Protection Voltage: 2.5 V
Over-current Protection Current: 3 A
Input Interface: micro USB
Size:27mm*17mm