Type-c5V Charging and discharging integrated module 3.7V 4.2V18650 lithium battery charging booster power supply board protection

Scope of use
Lithium charging DIY
Small appliance modification
Tablet with a charging port
Low power electrical equipment

Product features/dimensions

Main feature
1: Small volume. Smaller than similar products.
2: 4.5-5.5V power supply, suitable for a single lithium battery (parallel unlimited), the maximum 1.2A, according to the requirements of the use of stable 1A current.
3: Suitable for all types of 3.7V lithium batteries, including 18650 and aggregate batteries.
4: With overshoot and overdischarge protection, overdischarge protection 2.9V, charging cut-off voltage 4.2V!
5: When there is no external input voltage, it automatically switches to the output mode, and supports a small current of about 4.9V-4.5V.
6: Automatically switch the input and output, charge the battery when the external voltage is input, otherwise discharge, the charging green light flashes, the full green light is long on, the discharge light is not on when the standby without load, and the blue light is on when the discharge is loaded. Standby power consumption is about 0.8 mA.

Instructions for use
Usage method
The module can be used by connecting the positive and negative electrodes of 3.7V lithium battery, and the module itself is equipped with overshoot and overdischarge protection, and the lithium battery can also be equipped with a protection plate.
The Type-c port, welding hole, and the input and output interface reserved on the back are the same, and the line is directly connected, so there is no difference between the three groups of interfaces.
Function Description.
* When the charging current drops to 100mA after reaching the final floating charge voltage, the charging cycle is automatically terminated.
* Maximum charging current 1.2A, ensure the power supply, properly used to stabilize more than 1.1A.
* When the battery voltage is below 2.9V, the battery will be precharged at 200mA current.

Notes
* Do not reverse connect the battery, connect the reverse burning plate.
* Connect the charging head before connecting the battery to test whether the charging light of the module is displayed normally.
* Line can not be too thin, no power supply current can not keep up, the line must be welded.
* Batteries can be connected in parallel, not in series. It can only be 3.7V lithium battery, full of about 4.2V.
* This product positioning is not used as a charging treasure, the power is relatively small, the maximum is four or five watts. And there’s no charging agreement. It may cause problems with the use of some mobile phones, so when it is used to modify the charging bank, when some mobile phones have problems, we will not be responsible.

Use question answering
1. Where is the product used?
A: Small power equipment, backup power circuit, DIY modification.
2. Is input-output switching seamless?
A: It takes about 1-2S to switch. .