This is an enhanced USB-powered module for charging rechargeable lithium batteries using the constant-current/constant-voltage (CC/CV) charging method, programmable charging current up to 1000mA, constant current/constant voltage operation, thermal regulation function that maximizes the charging rate without the risk of overheating, and battery temperature Detection function [Type-C Ports]: It can charge for single-cell lithium battery or multi-section parallelled lithium batteries, can be powered by Type-C ports; The module with usb port, can be directly input to do with rechargeable lithium battery as a phone charger, and still retains voltage input wiring pads, which is convenient for DIY [High Safety]: This module provides constant-current/constant-voltage (CC/CV) charging, along with protection against over-voltage, over-discharge, over-current and short circuits to protect the battery and the device that it is powering, Input Voltage: 5V; Max output current: 1A; Charging cut-off voltage: 4.2V +/- 1%; Input interface: Type-C USB, small size and portable [Dual-color Charging Status Indicator]: No load the light not bright, red is charging, Green is fully [Note]: Please check all connections before charging, it be if the load OUT terminal on the positive and negative with wrong polarity. There is not included Installation instruction.If you are the first time to do this job, we suggest you can watch related video on before installation Colour: Black+Blue Material: Plastic Package Contents: 5 x Type-C USB 5V 1A Lithium Battery Charger Module 5 x Battery Holder 1 Slot Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.