SupTronics X1209 5V 6A UPS HAT for Raspberry Pi

The SupTronics X1209 is a dedicated uninterruptible power supply board designed to keep your Raspberry Pi running during power interruptions or adapter failures. It connects directly to the Pi's 40-pin GPIO header, delivering up to 5.1V at 6000mA without requiring cables or soldering. This makes it suitable for standard Pi setups as well as configurations running demanding applications or multiple peripherals. The board uses an integrated power MOSFET with just 7mΩ resistance to minimise energy loss during operation. Power input accepts voltages from 6V to 18V through a standard 5.5x2.1mm jack, and it can draw up to 6A from the adapter. This allows the system to charge the battery while simultaneously powering the Pi at full speed, even during the fastest charging mode. Battery management on the X1209 handles the heavy lifting automatically. The board charges compatible battery packs at 2100mA and includes Maxim's fuel-gauge circuitry to monitor battery voltage and remaining capacity over i2c. Four on-board LEDs show charging status at 25%, 50%, 75%, and 100% levels. The board also includes reverse-polarity protection and prevents battery overcharging or overcurrent conditions. Power switching between the adapter and backup battery happens transparently, so your Pi continues running without interruption during an outage. When the adapter returns, the system automatically restores charging. If battery voltage drops too low, the board can trigger a safe shutdown sequence via GPIO (the threshold is programmable). Once power returns, auto power-on resumes normal operation. The advanced power management system cuts power completely after the Pi shuts down, reducing standby consumption to preserve battery life for extended periods without an adapter. An on-board LED indicates whether the Pi is detected and running. The board can also monitor for AC power loss or adapter failures through GPIO pins, and it includes a physical power button that mimics the Raspberry Pi 5's shutdown behaviour. The X1209 works with Raspberry Pi 5, Pi 4, and Pi 3 Model B boards. Please note: Raspberry Pi not included. Features Compatible With

* Raspberry Pi 5 Model B / 4 Model B / 3 Model B

UPS Output:

* Designed for continuous long-duration operation (duration depends on battery type and applications)

* Supports a maximum current output of 5.1V 6000mA, suitable for most Raspberry Pi applications

* Integrated Advanced Power MOSFET with an equivalent of 7mΩ RDS(ON) to minimise power loss

* Power the Pi directly through the 40-pin header, eliminating the need for cables and soldering

* Equipped with XH2.54 connectors for 5V power output

Battery Charging:

* Supports fast battery charging with a capacity of 2100mA

* Battery charging control can be managed via GPIO

* Provides protection against battery overcurrent and overvoltage

* Built-in protection against reverse connection of battery cells

* Integrated Maxim's fuel-gauge systems for reading battery voltage and percentage over i2c

* On-board LEDs indicate battery charging and discharging levels of 25%, 50%, 75%, and 100%

* Features two XH2.54 battery connectors

Power Input:

* Integrated high-efficiency step-down DC-DC converter

* Wide operating input range of 6V to 18V

* Provides up to 6A output current, enabling 2.1A fast charging while powering the system

* Allows power input from various sources such as a car, solder panel, and more

* Common power input jack size of 5.5x2.1mm

* Compatible with Raspberry Pi USB-C Power Supply

Enhanced Power Management:

* Seamless power switching between backup power and power adapter

* On-board push button performs the same actions as the Pi's power button (Pi 5 only)

* Automatically cuts off power when the Pi is shut down

* On-board LED indicates power status and Pi detection

* AC power loss and power adapter failure detection via GPIO

* Auto power-on when power is applied or restored

* Automatic safe shutdown when battery voltage is low (programmable)

* Ultra-low standby power consumption to maximise battery life

* Advanced system power-path management to minimise frequent charging and discharging of batteries

Specifications

Power input 6-18Vdc via DC jack (12Vdc ≥3A power adapter recommended) 5Vdc 5A via USB-C

UPS output 5.1V ±5% Max 6A

Battery charging current 2.1A **

Terminal Battery Voltage 4.23V **

Battery Recharge Threshold 4.1V

Ports & Connectors DC power jack x1- 5.5x2.1mm USB-C power in connector x1 XH2.54 battery connector x2 5V Power output connector x2 - XH2.54 2-pin 40-pin extended GPIO header x1

PCB Size 65mm x 57mm

**Please confirm your battery specifications before connecting. Safety Instructions & warnings

* The default charging current is set to 2.1A and charge cut-off voltage is 4.23V. before connecting your battery to the UPS board, Please carefully confirm the maximum charging current and voltage, exceeding the upper limit of the charging specification that the battery can withstand will not only cause adverse reactions, but may also cause irreversible damage.

* It is essential to read and understand these safety instructions and warnings before charging your batteries.

* Lithium Polymer and Li-ion batteries are volatile. Failure to read and follow the instructions below may result in fire, personal injury, and damage to property if charged or used improperly.

* Never make a wrong polarity connection when charging or discharging battery packs. Always double-check the polarity of the battery's connector to ensure that "+" is connected to "+" and "-" is connected to "-".

* Do not mix and use old batteries with new batteries, or batteries with different brand names.

* Lithium batteries have a limited cycle life. Please replace old batteries with new ones when they reach their service life or when they are two years old, whichever comes first.

* When charging the Battery Pack, please place the battery in a fireproof container. Do not leave the UPS shield on wood material or carpet unattended.

* Keep the UPS shield away from children to ensure their safety.

Resources

* Hardware information and assembly

* Software setup/tutorials

Package Contents

* 1x X1209 V1.0 UPS board

* 4x Spacer M2.5 F/F 13.5mm

* 8x Screw M2.5x5mm

* 1x Pogo pin (For use with Pi 5 only)

Please note: Raspberry Pi not included.