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Super Watchdog HAT with UPS Battery Backup for Raspberry Pi

SKU: SM-I-003

Regular price $35.00


Version 7 has important new features:

  • Super Watchdog HAT with UPS Battery Backup for Raspberry Pi
  • Enhanced battery charger provides up to 700mA charging current
  • Charge and Standby status LEDs
  • Battery overheating protection
  • Socket for two Li-Ion 18650 batteries
  • A must for all RPI mission critical installation
  • Cycle RPI power after software lock-up
  • Prevent SD Card damage during power outages
  • On board battery charger, step-up converter and intelligent power monitor
  • Double power supply jacks: USB-C and pluggable 3.5mm connector
  • Provide up to 3A/5V power to Raspberry Pi from Li-Ion Battery
  • Uses only I2C port (address 0x30) leaving all GPIO pins available
  • Works with any Raspberry Pi from ZERO to 5
  • ECCN Code EAR99
  • On board resettable fuse
  • On board reset pushbutton
  • Command Line Interface
  • Python Library


Raspberry Pi Watchdog HAT and Battery Backup for all Raspberry Pi Boards.

Listening to customer's suggestions, the Super Watchdog has been (again) redesigned. The latest Version 7 has significant improvements: 

  • Dual socket to 2x 18650 batteries
  • Battery overheating circuit which cuts charging if the battery temperature increases
  • Better (faster) charghing circuit

Super-Watchdog with UPS battery backup for Raspberry Pi

If you use your Raspberry Pi for any mission critical project, you need the Super-Watchdog HAT with battery backup. The watchdog is the same size with Raspberry Pi (85 x 56mm) and packs a lot of functions.

The Watchdog HAT provides the safety required by mission critical projects, implementing two major functions. It power-cycle the Raspberry Pi in case of software lock-up, resetting not only the Pi but also any peripheral attached to it, and it prevents SD-Card failure in case of power loss, by allowing the Raspberry Pi to shut down itself safely.

The Watchdog HAT has a default timeout of 120 seconds. Once installed, if it does not receive a reset from Raspberry Pi within 2 minutes, it cuts the power and restores it after 10 seconds.

Raspberry Pi needs to issue a reset command before the timer on the watchdog expires. The command can be sent either on the I2C port , or by toggling GPIO11 ( Pin 23 on the GPIO connector). The timer period after power up and the active timer period can be set from the command line. The number of resets is stored in flash and can be accessed or cleared from the command line.


The Raspberry Pi  Watchdog HAT is compatible with all Raspberry version B+, 2, 3, 4, 5 and Zero. The card share the I2C bus using only two of the Raspberry Pi’s GPIO pins to manage all eight cards.  This feature leaves the remaining 24 GPIOs available for the user.


The Raspberry Pi Watchdog HAT needs 5V to operate. For your convenience, the board is equipped with three power connectors: a micro-USB connector similar with the one found on the Raspberry Pi boards, a USB Type-C, and a 2.1mm barrel connector found on many standard 5V power supplies. In order to operate, the watchdog must provide the power to Raspberry Pi.


The 18650 Li-Ion battery (not provided) can keep the Raspberry Pi running for hours, assuring continuous operation during power outages. When running on battery power, the Watchdog HAT processor monitors the battery voltage. To prevent permanent damage to the battery due to over-discharging, the processor will cut off the power to Raspberry Pi when the battery drops below 2.8V. A software command is available to the user to also monitor the battery voltage. It is strongly recommended that Raspberry Pi performs a self-shutdown then the battery voltage drops to 3.0V.


The Raspberry Pi  Watchdog HAT has on board hardware to self check all the major functions. Self check is performed at each power up. The on-board LED is flashed rapidly (5 times per second) if a hardware error is detected, or slowly (1 time per second) to indicate normal functionality. The LED is turned on if the Watchdog HAT resets the Raspberry Pi, and off is the Raspberry Pi is powered down for a specific time interval.


Version 6 of the Watchdog HAT has an on-board pushbutton which can be read by the local processor, which in turn can interrupt the Raspberry Pi. The pushbutton can be used to shut down or reset the Raspberry Pi without a keyboard and monitor. A 2-pin jumper parallel to the pushbutton permits to install the bushbutton at a remote location when Raspberry Pi is installed in an enclosure


Super Watchdog Downloads



You can write your own application using the Command Line or Python Libraries provided. Python application example is provided.


1. SUPER-WATCHDOG HAT for Raspberry Pi

Super Watchdog UPS for Raspberry Pi

2. Mounting hardware

Watchdog Mounting hardware
3. Power Connector Plug
2-Pin power connector for Raspberry Pi watchdog


  1. Plug your SUPER-WATCHDOG card on top of your Raspberry Pi and power up the system from the watchdog.
  2. Enable I2C communication on Raspberry Pi using raspi-config.
  3. Install the wdt software from
  • ~$ git clone
  • ~$ cd /home/pi/wdt-rpi
  • ~/wdt-rpi$ sudo make install
  • ~/wdt-rpi$ wdt

The program will respond with a list of available commands.

Customer Reviews

Based on 6 reviews
Perfect battery backup with room for two 18650 - runs for hours

Watchdog works as expected. Two 18650 of 5Ah each can power my Raspberry Pi for many hours. Very useful HAT

Documentation missing

While I like the Watchdog, it mostly does what it is supposed to do, the documentation is only for version 6.0, while I have Version 7.0

Also, not all details about the behaviour are well explained, e.g. how to do a clean shutdown of the raspberry disabling the watchdog, and how to turn it back on afterwards through an external button.

Catrin Köhler
Great product

The Super Watchdog is a great product. I use the previous version productively in my private home automation environment. In the event of a power outage, it keeps my Raspberry Pi4 running for 2.5 hours before shutting it down. After the voltage returns, it restarts it.
Very reliable and professional.

Great Product

I've tested Waveshare and GeekPI UPS and they are riddled with bugs, this is by far the best PI UPS on the market. Love the watchdog feature, very simple and easy to use. Good work!

Andrew Simpson

This is now the only UPS I use for my products. It has never let me down.
What I like most about this product and company is the one-to-one support I get. Normally, asking for technical assistance you get to talk to some one who is not technician and reads from prearranged 'scripts'. I have regularly spoken to the designer and his/their support is way off the scale. They have accommodated and solved all my questions and in a timely fashion. For us support is key. This is the principle reason for only using their product

Cannot thank you enough!

FindMotion Ltd (UK)

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