WSAL23884 – UPS Module 3S/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 UPS Module 3S is an uninterruptible power supply module with a 3-series lithium battery configuration. It provides stable 5 V / 3.3 V outputs, supports simultaneous charging and discharging, and offers I2C monitoring for voltage, current, and power.

Related products at JW Tech

• WSAL23884 – Uninterruptible Power Supply Module, Supports charging And Power output at the same time, 3S & 5V 5A Output
• WSAL24197 – Uninterruptible Power Supply Module, Supports charging And Power output at the same time, 3S & 5V 5A Output
• WSAL25603 – Uninterruptible Power Supply Module, Supports charging And Power output at the same time, 3S & 5V 5A Output

Technical overview

• Output voltages: battery voltage (3S), 5 V up to 5 A, 3.3 V up to 300 mA
• Control interface: I2C; enables real-time monitoring of battery voltage, current, and power
• Supports 3 × 18650 lithium batteries in series (not included)
• Charger: 12.6 V / 2 A via DC5521 female port
• Dimensions: 60 mm × 93 mm; mounting hole diameter 3.0 mm
• Multiple protection circuits: overcharge, over-discharge, overcurrent, short-circuit, reverse-polarity protection, and equalizing charge
• Onboard 5 V regulator providing up to 5 A continuous output, suitable for Raspberry Pi and Jetson Nano
• LED indicators for verifying correct battery connection

Commands and examples – verify before use: 

sudo raspi-config
cd UPS\ Module\ 3S/
sudo python3 INA219.py

Notes and version constraints

• Batteries are not included; only use compatible 18650 cells
• First-time connection: if the LED is on, the battery is reversed — do not charge it
• If there is no power output on first connection, press the BOOT button to activate the battery protection chip
• Use only the supplied 12.6 V / 2 A power supply for charging; other supplies may damage the product if their ripple is too large or unstable
• If the positive insulation pad is broken, stop using the battery due to short-circuit/fire risk
• Never pry the battery's positive terminal with a screwdriver; work from the negative terminal instead
• Install the acrylic insulating board before use because exposed components on the underside can short against metal or conductors
• Lithium batteries have limited cycle life; replace them when they reach max cycles or after two years of operation
• Do not mix old and new batteries or different brands

Source and revision record

• UPS Module 3S - Waveshare Wiki
• Source revision: 111154
• Captured: 2026-09-04T03:32:54+00:00
• SHA-256: c84593d68e9310ba837620b403eea20d46fe439067d4d03a239b852dadea794c