Huami Amazfit Stratos 3 Specifications – Best Budget Triathlon Watch?

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Huami Amazfit Stratos 3 Specifications

Huami Amazfit Stratos 3 SpecificationsThe latest Amazfit Stratos multisport watch could be a market-beater for Huami/Amazfit. Certainly, the specifications look the part but only a good dose of testing prior to a review will see if the Stratos 3 can overcome the drawback of the sensor quality and interface of the promising previous model.

It certainly looks the part, just like the previous model. At first glance, there seems to be little difference but then you’ll quickly see that the 3 button controls of the previous model have been replaced by the innovative 2+2 button interface with 2 of those 4 buttons coming via a ‘rocker’ switch of some sort. That’s kinda quite ergonomically clever to have 4 buttons on one side.

Will it work? Only time will tell.

Huami Amazfit Stratos 3 Headlines

Through their initial marketing, Huami wants you to be acutely aware of the new, highly readable display (claimed) and they are also keen to point out a whopping 14 days of life in ‘Ultra’ mode – which comes out to a highly creditable 70 hours of real GPS usage. Couple that with 19 sports modes, NFC (China-only) and a good dose of Firstbeat features then I was certainly intrigued to delve some more into the details.

Huami Amazfit Stratos 3 Specifications

Next up we see there are two case versions. The basic stainless steel+silicone model is bettered by the titanium bezel and button of the Elite version which also has a sapphire screen. #Nice.

Then we come to the inevitable confusion of two operating systems each of its own chip. One for sports and one for the rest. I don’t know why they had to tell me that. I guess the argument would be that one is ‘tuned’ for sports usage.

GPS, Battery Modes & Connectivity

Huami Amazfit Stratos 3 SpecificationsThe smart mode gives a battery life of 7 days which includes 30 MINUTES of sports usage plus basic smart functionality which includes 24×7 HR. That doesn’t sound great but, actually, I think it’s fine as we then have more serious sports modes to deliver maximum accuracy over 35 hours, a balanced accuracy profile over 45 hours and a power-saving true endurance profile of 70 hours.

GNSS covers GPS, GLONASS and GALILEO (+regional). We’ll see later how accurate they might be. I also read that the now ever-present Sony GNSS chip is used, which we know CAN be quite good if integrated properly or not so good if poorly integrated.

The inclusion of WiFi looks interesting. I’m not entirely sure what it will be used for though as I would assume that workouts are sync’d over Bluetooth to the companion app and that Music will not support WiFi syncing at all. Let’s hope I’m wrong and there are direct uploads to, for example, STRAVA.

19 Sports Modes

Yep. These…

and of course, the Stratos keep the previous incarnation’s ability to play up to 1.9Gb of music stored on the watch via Bluetooth headphones

Huami Amazfit Stratos 3 Specifications

The Firstbeat features I believe are the same as on the original STRATOS and which include: VO2max Fitness Level, Training Effect: Aerobic, Training Load, Recovery Time Advisor, Real-Time Performance Condition, Personalized Training Plans: Cardio, Real-Time Coaching and Calories Burned.

Huami Amazfit Stratos 3 Specifications

Now you know…

  • Machine diameter – 48.6mm
  • Watch thickness – 13.4mm (heart rate Lens to TP screen)
  • weight – About 59.6g (Amazfit Smart Sports Watch 3), 68.7g (Amazfit Smart Sports Watch 3 Elite Edition)
  • Body material –  Metal, glass-reinforced polycarbonate
  • Strap type  – Quick release silicone strap (Amazfit smart sports watch 3), Quick-release fluoro rubber strap (Amazfit Smart Sports Watch 3 Elite Edition)
  • Strap width – 22mm
  • Strap length – Long strap with 120mm, short strap with 75mm
  • Display – 1.34-inch reflective low-power colour display
  • Resolution – 320 X 320px
  • Touch screen – AF coated Corning Gorilla 3 generation tempered glass (Amazfit Smart Sports Watch 3), AF + AR-coated sapphire (Amazfit Smart Sports Watch 3 Elite Edition). the touch screen can be entirely disabled for sports usage.
  • Button – 4 right-side buttons (2+2 on a rocker switch)
  • System mode – Intelligent mode, Ultra mode (supports ultra-low power)
  • RAM – 512MB LPDDR3
  • Memory – 4G eMMC (user available space is about 1.9GB)
  • Sensor – BioTracker PPG Bio-Tracking Optical Sensor (Accelerometer, Gyro, Air pressure sensor, Geomagnetic sensor)
  • Connection – Bluetooth 4.2 BLE 5.0, WiFi 2.4GHz 802.11b/g/n
  • Positioning – GPS, GLONASS, Beidou, Galileo
  • NFC – TBC (China-only)
  • Battery – 300mAh lithium-ion polymer battery
  • Charging time – About 2 hours
  • Charging method – Magnetic
  • Lifetime –
    • Smart mode 7 days – Use the factory default settings, all-day heart rate standby (Bluetooth connection mode), 150 messages per day, 30 times for wrist display, 30 minutes for outdoor sports, 5 minutes for other operations, 4 times for NFC card swiping;
    • Ultra mode 14 days –  Use the factory default settings, all-day heart rate standby (Bluetooth connection mode), 150 messages per day, 30 times for wrist display, 30 minutes for outdoor sports, 5 minutes for other operations, 4 times for NFC card swiping;
    • GPS mode – Accurate 35 hours / Balance 45 hours / Power saving 70 hours
    • Precision and equalization mode – Turn on heart rate detection, touch function, turn on notification reminder function, LCD low power is always on, update the wrist 10 times every hour, select accurate GPS recording accuracy, balance GPS recording accuracy;
    • Power saving mode – Turn off heart rate detection, touch function, notification reminder function is off, LCD low power is always on, and the wrist is updated 10 times per hour;
    • Note: GPS mode can be adjusted in three sport modes: trail running, outdoor walking and mountaineering. Accurate GPS recording accuracy is available in other outdoor sports modes.
  • waterproof level – 5ATM, support for swimming
  • operating system – Amazfit OS
  • supporting device – Android 5.0 or iOS 10.0 and above devices that support Bluetooth 4.0
  • Accessories – Dedicated USB charging stand, instruction manual, running manual



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Still no ANT+ receiver. Still no Stryd support. Garbage.


Does it support Stryd?


The second OS is for the low power CPU. Android consumes to much for a weeks long usage. A restart on Stratos (Android 5.1) can take up to four percent of battery life. WiFi is not new on the device. Pace and Stratos uses for OTA firmware upgrades. As far as I know it it possible to connect your watch to your phone via WiFi:

And of course you can install a file manager for file transfer if you don’t like USB connection:


AmazfitOS – the GUI and the SW logic behind the watch is written for Android. If you want to use its sports functionality, AmazfitOS and Android should run. On the other hand, if you wear the watch for activity tracking and as a timepiece, the low power environment is enough (e.g. Bip family has great battery life). It is not a WearOS device, this is why using as a smartwatch is PITA (no appstore on the watch, different CPU architecture, stock Android apps are not designed to small round screen). I meant that their first generation sports watch (Pace) had WiFi. At least the firmware upgrade uses it. See this video at 4:30:

Altough Huami has some hardware issues (battery draining, falling watch ears), the real problem is their buggy software and limited after sales support.

Mitch W

After years of use and abuse with a Fenix 2, it died, and I gave the Stratos a shot. That watch stopped taking a charge exactly one day after the warranty expired. Not wanting to pay the huge price-tag for a newer Fenix 5plus, I opted for a VivoActive 3. THe VA3 is not without its limitations, but is perfectly functional. I even used it (with hMSport connect IQ app) during a triathlon this past weekend. Worked great. The point is that even the lowly VA3 felt like an upgrade over the Stratos, despite not being a premium “multisport watch”. Stratos claims 24/7HR tracking, but in reality it checked it once every few minutes. For activities, the HR monitor was a random number generator, and in no way was based on reality. It had onboard weather app that never had the right weather. It recorded activities, but could not export a usable file (although does share with Strava…. with one caveat, not indoor activities like swimming and treadmill). It supposedly runs as a layer atop WearOS, but doesn’t have access to any apps. I am not quite sure what the upgrade is for the Stratos 3? The Stratos 2 had… Read more »


Is it possible to change the language from Chinese to English?

Grafto the Grafter

Wait for the “international version” sure this supports English out the box, I wouldn’t go as far to say I’ve been burned by Chinese with English firmware, but sometimes Chinese will show under program icons and in the menu’s, which while no show stopper is annoying.

Lawrence Spierings

And the glass is… ?


Do you know whether it’s possible to program or record swim splits with rest intervals using the Stratos 3? Something like recording the split for 50m and then a 30sec rest intervals.


Nice watch but I’m skeptic that Huami can provide a stable firmware. My old Stratos works but it crashes sometimes.. And some old bugs are still not fixed.. (intervall training, crash upon long runs, The watch must be resetted every 2 months). Huami watches are not suitable for serious Athletes. Unfortunately….

tfk, the5krunner

fair point but the buttons on both my Edge 530 and Forerunner 945 did not work properly and were not suitable for a serious athlete. I get what you are saying though.


Are there problems with FR945? What would you suggest for serious athlete? Thx


Can you please make a review for this watch?


tfk, the5krunner

😉 These things cost money! Requests from full supporters are always given more weight when i device what to review.


After reading your in depth review of the original Stratos i gave it a shot. Worked really well for a couple of months until the HR sensor protective cover fell off. Some moisture got inside and that was that. Got a new watch under warranty and all was good until the same thing happened on the new one as well. This time one month after the warranty expired. After some digging online i found out that a lot of people had the same problem. There are even videos of the issue on youtube.
There were some software bugs but those were minor issues (sometimes syncing with Strava took a couple of hours)
Although the new Stratos looks great, the last one left a bad taste and even though it’s “cheap” it’s still cca. 200$ for a watch that fell apart 2 times in 12 months.
So i’m still on the lookout for the next budget friendly smartwatch, if that even exists 😀


Sorry for the late reply
I did manage to get a full refund, but it took a while.
I also live in EU(Cro) but it apears that 2year warranty law does not apply here.
There is a bunch of electronic products that have “only” 1 year warranty in Croatia.
I am looking now at Suunto 5 or FR 245 since that is my max budget, and they don’t fall appart after 6-7 months of use.
Thanks for the advice
I know its a bit of a stretch, but out of those two mentioned, whitch one would you recommend?

tfk, the5krunner

suunto 5 good too
the 2 year law is an eu one. companies may very well tell you it isn’t the law but that doesn’t mean its true. however i think after one year they only have to repair it unless it’s not fit for purpose
your contract is with the RETAILER. buy it from and get it shipped to you

Rohan Joshi

Hi! I’ve recently ordered a Global Version of the watch. Hope it reaches in time. Meanwhile, it’d be greatly appreciated if you’d post a full review of the watch capabilities.
Cheers man!!

tfk, the5krunner

hi there, the capabilities/specs are as listed above. Remember I have to buy these devices and then spend about a week of my time preparing and writing a review


Is there a way to have a Triathlon mode on ?


Yes, there is.