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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 ==
The Waveshare UPS HAT is an uninterruptible power supply (UPS) for the Raspberry Pi family. It uses the standard 40-pin GPIO header, communicates over I2C, and provides a stable 5 V output with up to 2.5 A continuous current. Two 3.7 V 18650 batteries (not included) allow operation without mains power.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL18160 WSAL18160 – Uninterruptible Power Supply UPS HAT For Raspberry Pi, Stable 5V Power Output]
* [https://shop.jw-tech.eu/p/WSAL18306 WSAL18306 – Uninterruptible Power Supply UPS HAT For Raspberry Pi, Stable 5V Power Output]

== Technical overview ==
* Interface: standard Raspberry Pi 40-pin GPIO expansion header; fits common Pi boards.
* Communication: I2C bus for real-time monitoring of battery voltage, current, power, and remaining capacity.
* Protection circuits: overcharge/discharge protection, overcurrent protection, short-circuit protection, reverse-polarity protection, plus equalizing charge feature.
* Voltage regulator: onboard 5 V regulator with up to 2.5 A continuous output current.
* USB output: separate 5 V USB port for powering other boards or devices.
* Indicators: LEDs indicate correct battery connection; warning LED lights up if polarity is reversed.
* Charger: supplied 8.4 V/2 A charger plugs into the 8.4 V charging port.
* Dimensions: 56 mm × 85 mm, 3.0 mm mounting hole; total height after mounting on the Pi approx. 42.05 mm.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo raspi-config
sudo reboot
sudo apt-get install p7zip
wget https://files.waveshare.com/upload/d/d9/UPS_HAT.7z
7zr x UPS_HAT.7z -r -o./UPS_HAT
cd UPS_HAT
python3 INA219.py
sudo apt-get install i2c-tools
sudo i2cdetect -y 1
</syntaxhighlight>

== Notes and version constraints ==
* Batteries are not included – 3.7 V 18650 lithium cells must be sourced separately.
* First-time setup: the board may not work until the batteries have been charged; fully charge them before first use.
* Use only the supplied 8.4 V/2 A charger – other adapters can damage the board.
* Negative current values mean the batteries are discharging (powering the Pi); positive values indicate charging.
* The default software assumes 5200 mAh (2 × 2600 mAh cells). If you use higher-capacity cells, the program parameters must be adjusted accordingly.
* Lithium batteries age and have limited cycle life; replace them when max cycles are reached or after two years of service, whichever comes first.
* I2C address per source is 0x42; verify on your system as it may differ.

== Source and revision record ==
* [https://www.waveshare.com/wiki/UPS_HAT UPS HAT - Waveshare Wiki]
* Source revision: 89364
* Captured: 2026-09-01T03:08:28+00:00
* SHA-256: <code>6aa38d016241c4a446e4ada7e11519bb558a0900ebbf832246dec9026d9d7fab</code>

WSAL18160 – UPS HAT/en - Versionsgeschichte

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