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X306 UPS Shield for Pi zero W/2W
X306 UPS Shield for Pi zero W/2W- Front View
X306 UPS Shield for Pi zero W/2W - Rear View
X306 UPS Shield for Pi zero W/2W
X306 UPS Shield for Pi zero W/2W + C296
X306 UPS Shield Packing List


X306 is a one cell 18650 UPS shield designed for Raspberry Pi Zero W / 2W.

It equipped with 3 standard USB-A 2.0 ports, and a USB Type C to power. The USB-A port can be used to connect external devices such as mouse, keyboard etc.


  • The Raspberry Pi board, power adapter are not included in the packing list.
  • Raspberry pi micro OTG port cannot be used as it is occupied by USB HUB

4 Pin header function description:

Pin Function
AL ON: Pin 1&2 Short: Power always on, power button disabled;
AL ON: Pin 1&2 Open: Power button Press to switch on, Hold 3 seconds to switch off
PWR SW: Pin 3&4 for external 2-pin momentary switch

"AL ON" enable, "PWR SW" will be disable.

"PWR SW" enable, "AL ON" will be disable.


  • Ideal Uninterruptible Power Supply (UPS) solution for Raspberry Pi Zero W/2W
  • Max 5.1V 4000mA Power Backup for even the most demanding Raspberry Pi set ups
  • 18650 single cell battery holder
  • Upto 1000mA charging current
  • Integrated battery reverse polarity protection circuit
  • Integrated over current protection and over voltage protection
  • Intelligent automatic charging and discharging
  • 4 blue LEDs indicate battery charging and discharging levels of 25%, 50% , 75% and 100%
  • Red & green LEDs show the status of power on/off and charging status
  • On-board push button to control power on /off (Press-ON, Hold the button pressed at least 3s -OFF)
  • Ultra-low standby power consumption of μA to maximize battery life
  • Integrated IN-to-SYS pass-through path to pass the input voltage to the system
  • Advanced system power path management avoids frequent charging and extend battery life
  • Connects to the Raspberry Pi via Pogo Pins - no wirindg & soldering required
  • 4-pin header for external power swtich and always-on power option
  • Equipped with three USB2.0 ports and one USB2.0 4-through-holes for more USB expansion


  • Input supply voltage: 5Vdc +/-5%
  • Input supply current: ≥3A
  • Charging current: 900~1050mA
  • Trickle charge current: 130~140mA
  • Predetermined Charge voltage: 4.2V +/-1.5%
  • Output voltage: 5.1V +/-5%
  • Max output current: 4000mA

How to Power

Power Input: 5.1Vdc +/-5% , ≥3A (Power Via USB Type-C port of X306 NOT Pi zero 2W)

How to charging X306 UPS shield?

How to Cool

Aluminum Heatsink for raspberry pi zero 2 w, please refer to C296

Support Geekworm C296 Heatsink for Pi Zero 2W

Packing List

  • 1 x X306 18650 UPS Shield
  • 4 x M2.5 x 5mm Screws


Q1. What 18650 battery is recommended?

A: 18650 battery dimension


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