WSAL20121 – Pico-UPS-B/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 Pico-UPS-B is a dedicated UPS module for the Raspberry Pi Pico series. It combines a Li-Po battery switching charger with dynamic power path management and an I2C-based voltage/current monitoring chip. The male pin header allows stacking other modules on top.

Related products at JW Tech

WSAL20121 – UPS Module for Raspberry Pi Pico, Uninterruptible Power Supply, Li-po Battery, Stackable Design

Technical overview

Compatibility: Standard Raspberry Pi Pico header supports all Pico-series boards (RP2040/RP2350).
Battery type: Supports 600mAh 3.7V Li-Po battery (not included in package).
Charging voltage: 5V charging input via the Pico USB connection.
Control bus: I2C for real-time monitoring of battery voltage, current, power, and remaining capacity.
Protection circuits: Multi-protection against overcharge/discharge, overcurrent, short circuit, and reverse polarity.
Indicators: Onboard recharging and power LEDs for quick battery status checks.
Dimensions: 60 × 21 mm; stackable design via male pin header.
Resources: Online demos in C/C++ and MicroPython available; schematic documentation and ETA6003 datasheet as reference.

Commands and examples – verify before use:

wget -P ~/pico https://files.waveshare.com/upload/5/5a/Pico-UPS-A.zip
cd ~/pico && unzip Pico-UPS-A.zip
cd ~/pico/Pico-UPS-A/c/build/
cmake -DPICO_BOARD=pico -DPICO_PLATFORM=rp2040 ..
make
sudo mount /dev/sda1 /mnt && sudo cp Pico_UPS.uf2 /mnt && sudo sync && sudo umount /mnt && sleep 2 && sudo minicom -b 115200 -o -D /dev/ttyACM0

Notes and version constraints

The demo files refer to 'Pico-UPS-A' even though the product is Pico-UPS-B – please verify before use whether the demos also work for the B module.
Li-ion/Li-po batteries can cause fire, personal injury, or property damage if mishandled. Never connect in reverse polarity, only use verified chargers.
Batteries have limited cycle life and degrade over time; replacement required after reaching max cycles or aging.
Store lithium batteries carefully: keep away from flammable/explosive items and children, avoid improper storage.
Windows usage requires correct serial configuration (baud rate 115200, DTR enabled); exact COM port assignment must be confirmed manually.

Source and revision record

Pico UPS B - Waveshare Wiki
Source revision: 91361
Captured: 2026-09-02T03:16:01+00:00
SHA-256: 9bd14a1bf39a1173bf924df022612cf33f6cc2012a06340ab54f38cc12347f6e