Portable Oura Ring Charger

I love my Oura ring and have been using it for a bit more than 2 years (as of Jan 2025). I am usually good about charging but I sometimes forget and have a dead ring during the day. The charger that comes with the ring plugs into the wall, but it isn’t always convenient to find an outlet. So I wanted to build a portable battery pack that when combined with the standard ring charger, creates a portable system.

Charger V1 Specifics

  • 3.7V/2500mAh li-ion battery

  • combo li-ion charging/powering circuitry (Adafruit part 4755)

  • male and female USB-C ports

  • 5V boost converter

  • 3D printed enclosure

You can charge the battery and charge the ring at the same time. The entire system is compact and can fit in the pocket for on-the-go travel.

Charger V2 Specifics

• 3D-printed case

• Anker Nano Power Bank

• Case held together with 4, button head M2 bolts

This design requires no electronics assembly and is designed to be the fastest route to a portable charger/battery system.

Charger V1 Media

IMG_6115.jpeg
IMG_6124.jpeg
IMG_6127.jpeg
IMG_6128.jpeg
IMG_6126.jpeg

Charger V2 Media

top view.png
side view.png
iso view.png
front view.png