20pcs Mini USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators(Type-C Port)

Features: Input Voltage: 5V Current: 1A Charging Cut-off Voltage: 4.2V/4.35V optional; Input Interface: Type-C USB 5-6V power supply, applicable to a single lithium battery (parallel connection is not limited), the default 1A current. Applicable to all types of 3.7V lithium batteries. Small size. Smaller than similar products. The use of the scope: lithium charging DIY, small electrical appliances conversion, tablet PC with charging port, small power power equipment. Notes: When the charging current drops to 100mA after reaching the final float voltage, the charging cycle will be automatically terminated. When the battery voltage drops below 405V (roughly corresponding to 80% to 90% of the battery capacity) the charging cycle starts again. When the battery voltage drops below 2.9V, the battery will be pre-charged with 100mA of current. With protection board, over-voltage protection, over-discharge protection, and over-current protection. Over-discharge protection value 2.4V, over-current protection value: 4A. Red light when charging, blue light when full. The battery can not be reversed, reverse connection damage to the motherboard; The battery terminal voltage can not exceed the product overshoot voltage; The battery can not be connected in series, only in parallel, the number is not limited; The first time you need to connect the power supply to activate the protection board.

• ★An ultra-small, 1A charging board for 3.7V lithium batteries with USB Type-C power input and LED charge indicators.
• ★Charges to 4.2V, provides 100mA pre-charging for batteries with voltages under 2.9V; Incorporates automatic charge cycle termination and resumption for efficient charging.
• ★With protection board, over-voltage protection, over-discharge protection, and over-current protection. Over-discharge protection value 2.4V; Over-current protection value: 4A
• ★Suitable for all types of 3.7V lithium batteries,small appliances modification and tablet PC retrofit charging port. Suitable for single lithium battery (parallel connection is not limited, can not be connected in series).
• ★Note: The first time you use it, you need to connect the power supply to activate the Charging protection board! If you are the first time to do this job, we suggest you can watch related video on the Internet before installation.