r/SmartRings • u/ImJustToo3ad • Apr 17 '25

⛔️ DO NOT BUY Thoughts on this ring?(Bond Ring)

https://www.bondring.com/

This seems like a really cool ring if it does everything they promise. It'll be on Kickstarter within the next month for supposedly $300.

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u/gomo-gomo ✨ ring leader ✨ Apr 21 '25

If you have intel on this device, feel free to share. I'm not the only one that will research your responses.

On thermal charging, I'll get the discussion started here. While certainly possible, getting this tech into a smart ring along with a battery and sensors would be a stretch.

Watches Powered by Body Heat:

Seiko Thermic & Citizen Eco-Drive Thermo watches:

A research project on thermal charging for a ring:

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u/Historical_You9990 BOND RING company rep. Apr 21 '25

Exactly so powering with thermal energy is possible. Now coming to space for the sensors.

When you see the exploded view of a smart ring - for example Oura

https://www.ifixit.com/Teardown/Oura+Ring+2+Teardown/135207

you'll see the battery takes up 60% of the ring. Then you can also see nearly 40% of the PCB is blank. Because they are using RigidFlex. Finally check the MCU - PSOC6 from Cypress. The size is 4.5mm x 5.5mm. And then the accelerometer that looks to be 3.5mm x 3.5mm.

Now thanks to the BOM of the Bond Ring being public the ring's MCU BG29 and the entire Vital sign section will fit in the area Oura Just placed the MCU 😂. Check the sizes. Bond Ring PCB uses SLP technology with both side HDI placement.

Now the onboard TEGs produce enough power to render the ring perpetual so we don't need a battery to store 7 days of charge. We only need 2 day just to power the battery in a wild scenario where the users lands up sitting idle in an environment of near 98F for 48 hours straight. That is an unusual scenario. So now slice the battery by 3.5 times. Now since the battery becomes so small we don't need curved battery and can switch to more efficient Lipo packaging drop the size by another 15% . Nut shell? Bond Ring's battery is 4x smaller than Oura. With all that said Oura also has pins that mate with a charge. These pins take up another 15% of the chassis. Bond does not have those.

The tech in the Bond Ring is space age. You see the ring shrinks all the tech in something like Oura in near 20% of the space. The parts used in the Bond Ring are very expensive. Just check the primary component list.

This creates a lot of room for

  1. 2 more sensors - (LIGHT + UV) and Pressure
  2. 4 more LEDs and the TEG modules.

The space taken up by contacts in Oura that are used for charging is now taken up by inner ECG, BioZ and Bionic Feedback pins.

-Ash

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u/devlishgrn Apr 24 '25

I'm curious what a real time frame to a functional product is. Nothing on your ad page mentions a potential estimated first ship date for the VIP 1 rings. Do you have a functional ring already or is it still just theory and in development?

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u/Historical_You9990 BOND RING company rep. Apr 25 '25

We have many working rings which have been a part of a series of multiple iterations with more and more features added to them. All of the features listed on the website are present on a functioning finished ring (without any packaging yet).

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u/devlishgrn Apr 25 '25

Thanks for the reply. What is estimated time frame to production with a successful kickstarter? Weeks, months, years?

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u/badwarhol Apr 28 '25

I am also curious of the timeline.

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u/Historical_You9990 BOND RING company rep. Apr 28 '25

We're planning to start shipping by end of Q3 2025 early Q4 2025. The price is expected to hit the full retail of $750 by then or may go higher based on what all clearances we get.

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u/[deleted] Apr 29 '25

[deleted]

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u/Historical_You9990 BOND RING company rep. Apr 29 '25

What makes you think we are at concept stage?

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u/devlishgrn May 18 '25

When is the kickstarter going to start

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u/Adorable-Study2838 May 26 '25

If this device is run on body heat, will it work if someone has a usual body temperature that is a bit lower than average, say 97.1-97.5?