Scienticy TP4056 Lithium Battery Charging Module With Protection (Pack of 3) Electronic Components Electronic Hobby Kit

Scienticy [A] Include Current Monitor.... [B] Under Voltage Lockout..... [C] Automatic Recharge..... [D] Charger and Protection Circuit in One Module..... [E] Two Status Pin to Indicate Charge Termination..... [F] Indicate the Presence of an Input Voltage..... [G] Preset 4.2V Charge Voltage with 1.5% Accuracy..... [H] charging module for 3.7v battery Functional usages: input voltage is 5V, battery over-discharge protection voltage is 2.5V, battery over current protection current is 3A; Connect the battery to the B+ B-, inserted into the USB female mobile phone charger, the red light is being charged and the green light to full