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'''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.<br />
<br />
== Summary ==<br />
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.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL20121 WSAL20121 – UPS Module for Raspberry Pi Pico, Uninterruptible Power Supply, Li-po Battery, Stackable Design]<br />
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== Technical overview ==<br />
* Compatibility: Standard Raspberry Pi Pico header supports all Pico-series boards (RP2040/RP2350).<br />
* Battery type: Supports 600mAh 3.7V Li-Po battery (not included in package).<br />
* Charging voltage: 5V charging input via the Pico USB connection.<br />
* Control bus: I2C for real-time monitoring of battery voltage, current, power, and remaining capacity.<br />
* Protection circuits: Multi-protection against overcharge/discharge, overcurrent, short circuit, and reverse polarity.<br />
* Indicators: Onboard recharging and power LEDs for quick battery status checks.<br />
* Dimensions: 60 × 21 mm; stackable design via male pin header.<br />
* Resources: Online demos in C/C++ and MicroPython available; schematic documentation and ETA6003 datasheet as reference.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
wget -P ~/pico https://files.waveshare.com/upload/5/5a/Pico-UPS-A.zip<br />
cd ~/pico && unzip Pico-UPS-A.zip<br />
cd ~/pico/Pico-UPS-A/c/build/<br />
cmake -DPICO_BOARD=pico -DPICO_PLATFORM=rp2040 ..<br />
make<br />
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<br />
</syntaxhighlight><br />
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== Notes and version constraints ==<br />
* 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.<br />
* Li-ion/Li-po batteries can cause fire, personal injury, or property damage if mishandled. Never connect in reverse polarity, only use verified chargers.<br />
* Batteries have limited cycle life and degrade over time; replacement required after reaching max cycles or aging.<br />
* Store lithium batteries carefully: keep away from flammable/explosive items and children, avoid improper storage.<br />
* Windows usage requires correct serial configuration (baud rate 115200, DTR enabled); exact COM port assignment must be confirmed manually.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Pico-UPS-B Pico UPS B - Waveshare Wiki]<br />
* Source revision: 91361<br />
* Captured: 2026-09-02T03:16:01+00:00<br />
* SHA-256: <code>9bd14a1bf39a1173bf924df022612cf33f6cc2012a06340ab54f38cc12347f6e</code></div>JWTechPublisher