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X703 V1.2 Function Header-New
X703 Function Header-Old
X703 Interface
X703 V1.2 Dimensions-New
X703 Dimensions
X703 V1.2 Packing List-New
X703 Packing List-old

Update History

In July 8th 2022, the X703 V1.2 UPS has done a small update,the "AON" Pin has been updated to "PON" Pin, also the pcb components position will be a little difference. Please refer to the below photo:



  • NOT supports software safe shutdown.
  • Do not apply power to your Raspberry Pi 4 via the Type-C socket.
  • Please use high quality power supply, the low quality power supply will generate surge Voltage, which will damage the board chip. we recommend Panasonic brand NCR18650BD 18650 lithium battery.
  • If 【CHG】 pin is OPEN, battery charging will be started after powering on and stopped after powering off. If 【CHG】 pin is SHORT, the battery will be automatically charged once your power adapter connected.
  • Do not short the"AON" pin.
  • Be sure to power off & remove the 18650 battery then wait for 2 seconds when toggle charging mode


The X703 is a new design UPS board which is specially designed for Raspberry Pi 4 Model B only. It provides an advanced uninterruptible power supply and power. The X703 adds 4 test pins to achieve powered between X703 and Raspberry Pi 4 without additional cable.

Safety Instructions and Warnings

You must read these safety instructions and warnings before charging your batteries.

  • Lithium Polymer and Li-ion batteries are volatile. Failure to read and follow the below instructions may result in fire, personal injury and damage to property if charged or used improperly.
  • Never make wrong polarity connection when charging and discharging battery packs. Always double check polarity of battery's connector to make sure "+" to "+" and "-" to "-".
  • Do not mix and use old batteries and new batteries, or batteries with different brand names.
  • Lithium batteries has it's cycle life, please replace old battery with new one when it reaches it's service life or when it is two year old, whichever comes first.
  • When charging Battery Pack, please put battery in a fire proof container. Please don't leave the X703 on the wood material or carpet and unattended.
  • Must keep the X703 away from children.
  • Please watch Main Video and Tutorial Video regarding 18650 batteries at: https://www.staysafebattery.com/en/


  • Smart Uninterruptible Power Supply (UPS)
  • ultra-thin
  • Supports 3A via Type-C socket fast charging
  • Add 4 test pins to achieve powered between X703 and Raspberry Pi 4 without additional cable.
  • Only work with single 18650 Lithium Ion battery
  • Integrated battery protection circuit
  • Integrated over current protection and over voltage protection
  • On-board 4 green LEDs indicate battery charging and discharging levels of 25%, 50% , 75% and 100%
  • On-board red LED show the status of battery charging or fully charged
  • On-board push button to control power on /off (Press-ON, Hold the button pressed at least 2s -OFF)
  • Allows power input via Type-C socket or XH2.54 connector
  • On-board 2-Pin PH2.0 connector allows to connect external power switch
  • DON'T supports software safe shutdown.


  • Power supply via Type-C socket: 5Vdc ±5%, ≥3A;
  • UPS output: 5.1V ±5% Max 3A
  • UPS charging current: 1A
  • Terminal Battery Voltage: 4.2V
  • Recharge Threshold: 4.1V

Packing List

  • 1 x X703 V1.2 18650 UPS Shield
  • 1 x Jumper link Pitch 2.54mm
  • 6x M2.5 *4mm Screws
  • 2x M2.5 *5+3mm Spacers
  • 2x M2.5 *5mm Spacers

User Manual

18650 battery dimension


Do not use 18650 battery with built-in protection circuit


Q1: Will X703 UPS work with the rpi poe hat?

A:No, the X703 UPS does not support rpi poe hat.

Q2: Why CHG light is not light up when external power supply is connected?

  1. The X703 UPS does not discharge when charging. Therefore, when external power adapter is used, raspberry pi is powered by the power adapter instead of UPS.
  2. When remove the external power adapter, raspberry pi will be powered by the battery, which can avoid frequent battery charging and discharging.
  3. Please make sure that the power adapter used is ≥3A, and always short the CHG , so that it can be automatically charged when an external power supply is connected.

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Anonymous user #6

8 days ago
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The X703 requires add. space for the Raspi 4.

Is there any recommendation from your side regarding a good fitting case?


2 days ago
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Hi,There is currently no matching case for x703 + Pi4.

Anonymous user #5

12 days ago
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Do you have any recommendations for a good battery that I can use with X703?


11 days ago
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Please use high quality 18650 battery such as Panasonic. And note the battery size(Please choose a flat-top battery, and the battery with a raised positive electrode is larger in size.)

Anonymous user #4

7 months ago
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Can battery % be read?


7 months ago
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X703 not support reading battery voltage and percentage.

Anonymous user #3

8 months ago
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Had you a drowing about the borings?

Anonymous user #2

10 months ago
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If mains power from charging adapter disappears, for example because of a power outage, will X703 take over powering the Raspberry PI without shutdown/reboot?


10 months ago
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That's what the UPS expansion board does, but only if the 18650 battery is available.

Anonymous user #1

10 months ago
Score 0++
Will X703 UPS work with X728-A2 battery holder?


10 months ago
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X703 UPS not support X728-A2 or X708-A1 battery holder.