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8PCS 2A 5V Charge Discharge Integrated Module 3.7V 4.2V for 18650 Lithium Battery Charging Boost Mobile Power Supply Charge and Discharge Protection Converter Protection PCB Board Module

About this item
Designed for MCU users, this device connects to the microcontroller for about 20 seconds to provide a low level that allows the module to continue functioning. It features low-level trigger mode (ground).
4 in 1 module for Charging / Discharging / Battery Protection / Battery Level Indication. Protection functions include over-current, overvoltage, over-temperature, and short circuit protection for lithium batteries.
The output activates automatically when the load is first connected. If the load is less than 50mA, the output automatically closes after 30 seconds; if the load exceeds 50mA, the output remains active.
High power efficiency with discharge efficiency up to 96%. In discharge mode, trigger the KEY port once to activate the output; continuously trigger the KEY port twice to deactivate it.
Suitable for applications such as converting solar panel energy to mobile phone charging, car charging retrofits, driving recorder power supplies, household power supply, intelligent plug transformations, and fast charging adapters.
Dimensions: 0.98 x 0.63 x 0.16 inches.

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Additional Information
First Listed on Newegg	May 19, 2026

Return for refund within: 30 days
Return for replacement within: non-replaceable
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Warranty Notice:
This product does not include manufacturer warranty when purchased or used outside of its designated sales region. By purchasing internationally, you acknowledge that warranty support from the manufacturer will not be available.