SupTronics X1203 UPS for Raspberry Pi 5

The SupTronics X1203 is a UPS (Uninterruptible Power Supply) add-on designed for Raspberry Pi 5. When combined with compatible batteries** connected via the XH2.54 connections, it provides a stable 5.1V 5A output, using a low-resistance MOSFET for reduced power loss. Power is delivered to the Raspberry Pi via pogo pins, avoiding the need for cables or soldering, with two XH2.54 connectors are available for additional 5V outputs.

This board features two XH2.54 battery connectors, intended to be used with 3.7V 18650 cells wired from a battery holder. It's ideal for those wishing to mount/store their batteries separately, away from the Raspberry Pi.

Charging is supported at up to 3A, with GPIO-based control and protection against overcurrent, overvoltage, and reverse battery connection. Battery voltage and percentage can be monitored over I²C via integrated Maxim fuel-gauge systems, with four onboard LEDs showing 25%, 50%, 75% and 100% levels. 

Power input is via a high-efficiency DC-DC converter with a 6V–18V input range (barrel jack) and up to 95% conversion efficiency. It supports up to 5.5A output current, allowing fast 3A charging while powering the system. Input can come from sources such as a car or solar panel, and it’s compatible with standard 5.5×2.1mm jacks. A USB-C port also offers the option to power with the Raspberry Pi 27W USB-C PSU.

Power switching is automatic between the adapter and batteries. The board can trigger safe shutdowns when battery levels are low, supports auto power-on, and mimics the Pi’s power button using an onboard power button. An LED shows system power and Pi detection, and GPIO pins monitor power loss or adapter failure.

The X1203 mounts underneath the Raspberry Pi 5, leaving the 40-pin GPIO free for other accessories such as HATs or coolers. A separate XH2.54 header is available if you want to connect your own external power button.

Raspberry Pi, batteries, cables, Active Cooler and power supply not included.

**SupTronics state that they intend this board to be used with 18650 cells (likely via a battery holder, plugged into the XH2.54 input connector). Check your 18650 batteries are the correct specification before using them with this board - i.e. 3.7V rechargeable lithium-ion - and ensure the XH2.54 connector polarity matches this board.

If you want something more all-in-one, consider other UPS options in the SupTronics range with battery holders built in.

Features

• Compatible with:
  • Raspberry Pi 5
• UPS output:
  • Supports a maximum output of 5.1V 5000mA
  • Advanced Power MOSFET with 7mΩ RDS(ON) for reduced power loss
  • Pogo pin connection for powering the Pi
  • Additional 5V power output via 2x XH2.54 connectors
• Battery charging:
  • Supports up to 3000mA fast charging
  • Charging control via GPIO
  • Protection from overcurrent and overvoltage
  • Reverse battery connection protection
  • Integrated Maxim fuel gauge for voltage and percentage via I²C
  • LED indicators for 25%, 50%, 75%, and 100% battery level
  • Two XH2.54 battery connectors
• Power input:
  • High-efficiency step-down DC-DC converter
  • Input voltage range: 6V to 18V
  • Up to 95% conversion efficiency
  • Supports up to 5.5A output, enabling 3A fast charging while powering the system
  • Supports power input from car, solar panel, etc.
  • 5.5×2.1mm DC jack
  • Compatible with Raspberry Pi USB-C 27W Power Supply
• Enhanced power management:
  • Automatic switching between adapter and battery power
  • On-board push button mirrors Pi’s power button behaviour
  • Automatically cuts power when Pi is shut down
  • LED indicates power status and Pi detection
  • Detects AC power loss and adapter failure via GPIO
  • Auto power-on when power is applied or restored
  • Programmable safe shutdown when battery voltage is low
  • Ultra-low standby current to maximise battery life
  • Power-path management reduces unnecessary charging cycles
• Miscellaneous:
  • Connects to Pi via pogo pins – no extra cables required
  • Mounts underneath the Pi, allowing HAT use
  • XH2.54 header for external power button

Specifications

• Power Input
  • 6–18V DC input range (12V DC 3A adapter recommended)
  • Common 5.5x2.1mm DC barrel jack
• UPS Output
  • 5.1V ±5% max 5A
• Battery Charging
  • Charging current: 2.3–3.2A
  • Terminal battery voltage: 4.23V
  • Recharge threshold: 4.1V
• Ports & Connectors
  • DC power jack – 5.5x2.1mm
  • 2x XH2.54 2-pin battery connectors
  • 2x XH2.54 2-pin5V power output connectors
  • 1x XH2.54 2-pin external power button connector
• PCB Size
  • 85mm × 68mm

Resources

• Software setup/tutorials
• Hardware information and assembly

Package Contents

• 1x SupTronics X1203 UPS Add-on for Raspberry Pi 5
• 1x Screw/standoff pack

Raspberry Pi, batteries, cables, Active Cooler and power supply not included.