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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Summary ==
Technical quick reference for the Waveshare UPS module that provides stable 5 V power to a Jetson Nano Developer Kit. Covers specifications, wiring, OLED display, commands, and safety practices.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL18193 WSAL18193 – Uninterruptible Power Supply UPS Module For Jetson Nano, Stable 5V Power Output]
* [https://shop.jw-tech.eu/p/WSAL18307 WSAL18307 – Uninterruptible Power Supply UPS Module For Jetson Nano, Stable 5V Power Output]

== Technical overview ==
* The module outputs a constant 5 V with up to 2.5 A continuous current via an onboard regulator.
* Communication uses the I²C bus; battery voltage, current, power, and remaining capacity are monitored in real time.
* A 0.91-inch OLED displays information such as battery voltage, IP address, and RAM usage.
* It supports 18650 lithium batteries (not included); four batteries provide a total capacity of 10400 mAh.
* The charging port expects the included 8.4 V / 2 A charger.
* A physical switch turns the Jetson Nano Developer Kit on or off.
* Warning LEDs indicate reversed battery orientation; they stay off when batteries are mounted correctly.
* Dimensions are 113 mm × 79 mm with 2.5 mm mounting holes.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo apt-get install python3-smbus -y
sudo apt-get install python-smbus -y
git clone https://github.com/waveshare/UPS-Power-Module
cd UPS-Power-Module
sudo ./install.sh
python3 -m ups_display.ina219
sudo python3 -m ups_display.display_server
sudo systemctl disable ups_display
sudo pip3 uninstall ups_display
</syntaxhighlight>

== Notes and version constraints ==
* Batteries are not included; use only manufacturer-grade 18650 cells.
* Use only the supplied 8.4 V / 2 A charger; other adapters may damage the module.
* On first use, batteries must be activated by charging on board; the device may not work until then.
* Lithium batteries have limited cycle life and should be replaced at max cycles or after two years, whichever comes first.
* Wiring: connect 5 V to 5 V and 3.3 V to 3.3 V; incorrect mapping can destroy the Jetson Nano.
* Negative current means discharge (battery powering the device); positive current means charging.
* If the OLED does not display, run 'sudo python3 -m ups_display.display_server'; if it works, disable and reinstall the boot service.
* When reconnecting the battery, keep the unit connected to the power supply so the switch responds.
* Standby runtime is approximately 10–12 hours; other load profiles are untested.
* Charging while powered off takes about four hours.

== Source and revision record ==
* [https://www.waveshare.com/wiki/UPS_Power_Module UPS Power Module - Waveshare Wiki]
* Source revision: 72164
* Captured: 2026-09-01T03:13:03+00:00
* SHA-256: <code>0de4793cb4c29bec1a44809f393c9a93e83ea86af9a582330bc773764e5c7c03</code>

WSAL18193 – UPS Power Module/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex