The revised title is: Mini USB 18650 Lithium Battery Charging Board with Battery Protection

About this item

• The TP4056 is a lithium-ion battery charger suitable for USB or adapter power. It has a fixed charging voltage of 4.2V and an externally adjustable charging current. It automatically stops charging when the current drops to 1/10 of the set value.
• When the input voltage is removed, the TP4056 enters low current state to reduce battery leakage. It can also be put in shutdown mode to reduce power supply current.
• The 18650 lithium battery charger board has a 5V input voltage and over-discharge protection at 2.5V. B+ and B- are used to connect the lithium battery, and OUT+ and OUT- are connected to the load.
• To charge the battery, connect B+ and B- and insert into a USB charger. The red light indicates that the battery is being charged, and the green light indicates that it is fully charged.