Fast Charger for Oura Ring Gen 4: Does It Really Charge That Fast?
My take on the Fast Charger compatible with Oura Ring Gen 4 after using it on the road as a size 13 wearer who needed a spare dock.
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When my old Gen 3 charger refused to work with my new Gen 4 ring on a business trip, I realized I’d made a $40 mistake before even leaving home. I recently went away on a business trip, didn’t get a chance to top off my Oura ring before I left, and figured I’d just plug it into the charger I already had. Nope. I tried to charge it with the old one and nothing happened. So you’ve got to buy one separately, and I didn’t know that before. That’s the whole reason I went online and grabbed this Fast Charger compatible with the Oura Ring Gen 4 as a backup.
Quick Verdict
I got stranded on a business trip with a half-charged ring and no dock, and this aftermarket charger fixed that problem for good. It charges up pretty quick, fits my size 13 Gen 4, and runs off the same USB-C cord I use for my phone.
Buy if you:
- Own an Oura Ring Gen 4 and want a spare dock in your travel bag
- Wear a size anywhere from 7 to 13 and want one dock that fits
- Already carry a USB-C cable for your phone and don’t want a second cord
- Left home before your ring hit a full charge more than once
Skip if you:
- Still wear a Gen 3 ring, this one won’t charge it at all
- Already keep the factory charger with you everywhere you go
- Don’t travel and never leave your nightstand dock behind
| Compatibility | Oura Ring Gen 4 only, sizes 7-13 |
|---|---|
| Charge speed | 80% in roughly 45 minutes |
| Connection | USB-C, 3.3 ft cable included |
| Safety | Over-current, over-voltage, short-circuit, over-temp |
| Includes | Dock, USB-C cable, user manual |
The Old Gen 3 Charger Left Me Stuck
If you’ve got a Gen 4 and you’re assuming your old dock still works, save yourself the trip. It doesn’t. This is the charger compatible with the newer ring, and that distinction matters more than the box lets on.
What You’re Getting In The Box
Inside the box: dock, 3.3-foot USB-C cable, manual, nothing else, and that’s by design. That’s basically it, and that’s fine. The listing calls it the “Fast Charger Compatible with Ou-ra Ring Gen 4: Charging Dock Stand for Size 13/12/11/10/9/8/7 with Type-C Cable,” which is a mouthful, but the short version is: it’s a fast charger built only for the Gen 4 ring in sizes 7 through 13.
The part I love is that it’s variable size. It’ll fit anything from a size 7 all the way up to a size 13. I wear a size 13 Gen 4 and it worked perfectly. One dock covers everybody, so if different people in the house wear the ring, you’re not buying separate chargers.
80% In 45 Minutes, Does It Hold Up?
80% in roughly 45 minutes, matches the factory charger exactly, no lag. I timed it against the factory charger and couldn’t tell the difference, ring on the dock, USB-C plugged into my phone brick, 80% in about 45 minutes both times. That’s all there is to it.
To check where you’re at, you tap the circular icon at the top right of the Oura app’s home screen and it shows your battery level. Nothing fancy about the dock itself, and that’s the point. It does the one job I need it to do, fast.
The One Thing That Trips People Up
Gen 3 and Gen 4 chargers do not cross over, I learned this the hard way trying to charge my Gen 4 with an old dock. I sat there trying to charge my Gen 4 with the old Gen 3 charger, watching nothing happen. If you don’t know that going in, you’ll waste time thinking your ring or your charger is broken when neither one is. Double-check the size engraved inside your ring and confirm you’re on Gen 4 before you buy, because this dock only works with the Gen 4. There’s no backward compatibility here, and that’s easy to miss.
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Oura Ring Gen 4 Fast Charger
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Who This Is For
Buy this if you’ve left home with a half-charged ring more than once and never want it to happen again. I like to have a spare or an extra charger in my travel bag with me at all times, because sometimes I leave home and it’s not fully charged. It’s great to be able to just grab this out the bag, especially at night before I go to bed in a hotel, plop the ring on, and let it charge overnight.
It’s also a smart pick for a multi-person household. Since one dock fits sizes 7 to 13, a couple wearing different sizes can share the same charger instead of buying two. And because it runs on standard USB-C, I can use it with my existing connections, the same ones I charge my phone with, so I don’t have to pack a separate cord.
Buying Tips Before You Order
Confirm you’re on Gen 4 first. That’s the mistake I made, and it’s the easiest one to avoid. Look inside the band for the engraved size and generation before you check out.
Keep this one dedicated to your travel bag so it’s always there. The whole reason I wish I had known this before is that I wouldn’t have gotten stuck at all. Toss it in the bag, plug it into any USB-C brick or your phone cable, and you’ve got a fast backup that hits 80% in about 45 minutes. If you’ve got a Gen 4 and you’ve ever left home with a half-dead ring, just buy this, it costs less than a bad night of missing sleep data.
Pros
- Fits sizes 7 to 13 on one variable dock, worked perfectly with my size 13
- Charges up pretty quick, right in line with the factory charger
- Standard USB-C, so I use my phone cable instead of a separate cord
- Small enough to just grab out of the travel bag at night
- Four built-in safety protections against overheating and surges
Cons
- Only works with Gen 4, so Gen 3 owners get nothing out of it
- No backward compatibility caught me off guard before I ordered
- It’s a basic dock, no travel case or extras in the box
Frequently Asked Questions
Is this charger compatible with the Oura Ring Gen 3?
No, it’s built exclusively for Gen 4 rings in sizes 7 to 13. I tried charging my Gen 4 with an old Gen 3 dock and it didn’t work either way, so the generations don’t cross over. Check the generation engraved inside your ring before buying.
Do I need the Oura app to use it?
You don’t need the app to charge, just to check the level. Place the ring on the dock and it charges on its own. To see the battery percentage, tap the circular icon at the top right of the Oura app’s home screen.
Does it come with a power brick?
No, you get the dock, a 3.3-foot USB-C cable, and a manual, but no wall adapter. Since the cable is USB-C, I just plug it into the same brick or phone cable I already carry. That’s part of why I don’t have to pack an extra cord.
Is it safe to leave the ring on overnight?
Yes, it has four built-in protections: over-current, over-voltage, short-circuit, and over-temperature. Even left plugged in for hours it’s designed to keep the ring safe from overheating or surges. I charge mine overnight in hotels without worrying about it.
Will one dock work for two people with different ring sizes?
Yes, the retractable design fits every size from 7 to 13, so two people can share one charger. That’s a real money-saver if a couple wears different sizes. Just verify each ring is a Gen 4 first.
How does it compare to the factory Oura charger?
In my use it hits the same 80%-in-45-minutes mark as the factory dock, I couldn’t measure a meaningful gap between the two. The practical difference: this one fits every size from 7 to 13 on one dock and runs off the USB-C cable already in your bag, so it earns its place as a travel spare without requiring any extra gear.
Is it small enough to travel with?
Yes, it’s ultra-compact and drops into any pocket or bag. That’s exactly how I use it, tossed in the travel bag so it’s there when I leave home without a full charge. It weighs next to nothing.
Can I use my own longer USB-C cable with it?
Yes, it uses a standard USB-C connection, so any USB-C cable works. The included cable is 3.3 feet, but I often just use the same cord I charge my phone with. That flexibility is one of the things I like most about it.
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Oura Ring Gen 4 Fast Charger
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