This TP4056 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. It helps the battery from getting over charged and over discharged.
This module uses the TP4056 Li-Ion charge controller IC and a separate protection IC. There are other types of modules on the market that use the TP4056 but lack any protection circuits or ICs to provide the necessary protection needed with lithium batteries. This module uses both the TP4056 and the DW01A Li-Ion battery protection IC, which together in combination makes the circuit very protective.