WSAL24760 – UPS Module Mini/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The Waveshare mini UPS module provides a stable 5 V output and supports simultaneous charging and discharging. Via I2C, battery voltage, current, power, and charging status can be monitored in real time.

Related products at JW Tech

WSAL24760 – Mini Uninterruptible Power Supply module, Supports charging And Power output at the same time, 5V 2.5A Output

Technical overview

Output voltage: 5 V; charging supply: 5 V; control interface: I2C.
Designed as a compact UPS expansion board for mobile robots and industrial control equipment.
Multiple battery protection circuits: overcharge/over-discharge, overcurrent, short-circuit, and reverse polarity protection, plus equalizing charge.
Onboard 5 V regulator with up to 2.5 A continuous output current on the OUT pin.
Warning LEDs indicate whether the battery is connected correctly and show the charging state.
Dimensions: 61 × 38 mm.
Shipped development resources include C, Python, and MicroPython demos for Raspberry Pi, Pico, STM32, and Arduino.
The battery (350 mAh Li-ion cell) is not included.

Commands and examples – verify before use:

sudo raspi-config
sudo reboot
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz
tar zxvf bcm2835-1.71.tar.gz
cd bcm2835-1.71/
sudo ./configure && sudo make && sudo make check && sudo make install
git clone https://github.com/WiringPi/WiringPi
cd WiringPi
./build
gpio -v
sudo apt-get update
sudo apt-get install python-pip
sudo pip install RPi.GPIO
sudo pip install smbus
sudo apt-get update
sudo apt-get install python3-pip
sudo pip3 install RPi.GPIO
sudo pip3 install smbus
sudo apt install unzip -y
cd ~

Notes and version constraints

When first connecting the battery, check whether the WARNING LED is on; if so, the battery is connected in reverse and charging is prohibited.
Without pressing the BOOT button after initial connection, no power output may be available.
For charging, use only the supplied power adapter; other chargers can cause unstable power with excessive ripple and damage the product.
If the insulation pad on the battery’s positive electrode is removed or damaged, stop using the module to avoid short circuit or fire risk.
Li-ion batteries have limited cycle life and degrade over time; replace them when max cycles are reached or after two years, whichever comes first.
When removing the battery, do not pry the positive electrode with a screwdriver; pry the negative electrode instead to avoid short circuits.
Before using any Arduino model other than Uno, verify that the pin connections are correct.
After using the BCM2835 library, the Raspberry Pi must be rebooted, otherwise Python and other C libraries will not be available.

Source and revision record

UPS Module Mini - Waveshare Wiki
Source revision: 89778
Captured: 2026-09-05T02:50:19+00:00
SHA-256: accbad90003de2f9712e521d99df978cf496ecda2c96a47ceef928929617098c