A new long-awaited firmware update is rolling out to Amazfit watches, and on paper it sounds like a strong one. The Amazfit Active 2 Latest Update 3.9.0.1 hits the Active 2 Square first, and it also shows up for the Amazfit Bip 6 and Active 2 Round. But once you install it, the experience is very different depending on which watch you own.
Below is a clear breakdown of what actually changed, where to find the new settings, and why the Bip 6 and Active 2 Round update feels a bit anticlimactic.
Amazfit Active 2 Square gets the real upgrades
The Active 2 Square update brings a mix of health feature changes and under-the-hood improvements. It also adds one small quality-of-life feature that should’ve been there from day one.
Here’s the quick overview of what shows up on the Active 2 Square after updating:
- Health feature update (Readiness changes to Biocharge)
- New button shortcut option (double-press the lower button)
- Background improvements (training plans, power meters, sleep scoring)
Software Version Check (Active 2 Square)
If you want to confirm you’re on the right build, check the firmware version on the watch:
Go to System > About.
On the Active 2 Square shown in the update, the software version is 3.9.0.1.
If you’re writing notes for yourself, this is the kind of screen that’s worth screenshotting in the Zepp app for reference (especially when features roll out unevenly).
Double-press the lower button now supports a shortcut
One of the most practical changes is the new shortcut option for the lower button. Before this update, the watch didn’t offer a shortcut for a double press on that lower button, and a lot of people missed having that option.
After updating, you can set it up like this:
Go to Settings > Preferences > Shortcut Buttons.
You should now see a third option called Double press low button. Open it, then pick what you want the double press to launch.
In the demo, the shortcut was set to Flashlight, and it launches quickly and works as expected.
It’s a small change, but it makes the watch feel easier to use day to day, especially when you want a tool without digging through menus.
Readiness score is now Biocharge (Active 2 Square)
The biggest headline change is that the Active 2 Square no longer uses “Readiness score” as the primary daily recovery style metric. It switches to Biocharge.
Biocharge is presented as a score you see when you wake up, often referred to as your wake Biocharge score.
The watch builds that number using your prior day activity, heart rate data, and sleep analysis. Then, as your day goes on, the score shifts based on what you do.
A simple way to think about it:
Biocharge goes down when you do things that cost you energy (like workouts).
Biocharge can go up when you recover (like taking a nap).
On the watch, you can review Biocharge and related details by scrolling through the Biocharge screen:
- View your current Biocharge score.
- Scroll up to see the wake Biocharge score.
- Scroll up again to see daily events.
That daily events section is where the watch calls out what happened and how it affected your score. For example, if you logged a workout, you may see it listed along with how many points it drained from Biocharge. If you took a nap, it may show up as an event that helps boost it.
For a deeper view, the graph and details are shown in the Zepp app (the transcript audio sounds like “Zap,” but this feature set is typically presented through Zepp).
The app view is where Biocharge trends make more sense, because you can see the day’s rise and fall as a timeline, not just a single number.
Background optimizations added to the Active 2 Square
Beyond the front-and-center features, this update also adds a few upgrades that matter a lot if you train often, follow plans, or care about more accurate sleep scoring.
Support for third-party workout plans (TrainingPeaks and Intervals)
The update adds support for third-party workout plans from:
- TrainingPeaks
- Intervals
Intervals support was already available on some higher-end Amazfit models, including the Amazfit T-Rex 3 Pro and Amazfit Balance 2, and now it shows up on the Active 2 Square as well.
If you’re comparing devices that already had this support, here are the two models referenced:
Stryd power meter support (stride power meters)
Another training-focused change is support for connecting Stryd power meters. If you run with a power meter, this is the kind of feature that can change what data you bring into your workouts.
The update mentions support for connecting these power meters, so the watch can pair with that hardware and use it for training data.
Sleep score algorithm optimized for accuracy
The update also claims an optimized sleep score algorithm for improved data accuracy.
This is the kind of change you won’t “see” as a new button or menu option, but it can matter a lot over time. If your sleep score has felt off, or sleep stages haven’t matched how you felt, this is the type of background tweak that may help.
The key word is accuracy, so the goal is more reliable sleep scoring rather than new sleep features.
Quick reference: Active 2 Square optimizations
If you want the short list of what was optimized on the Active 2 Square:
- Third-party workout plan support (TrainingPeaks and Intervals)
- Stryd power meter connections
- Sleep score algorithm improvements for better accuracy
Bip 6 and Active 2 Round updates feel unfinished
Here’s where the rollout gets confusing.
The Amazfit Bip 6 and the Active 2 Round received updates on the same day as the Active 2 Square. They were also expected to get the same key feature changes, like the shift from Readiness to Biocharge and the new double-press shortcut for the lower button.
After installing the updates, those headline features did not show up.
If you want a deeper look at the Bip 6 beyond software updates, read our Amazfit Bip 6 Review: Best Budget Smartwatch You Can Buy Today.
Software versions after updating (all three watches)
These are the versions shown after the updates:
| Watch | Software version shown |
|---|---|
| Amazfit Active 2 Square | 3.9.0.1 |
| Amazfit Bip 6 | 3.8.0.1 |
| Amazfit Active 2 Round | 6.7.0.1 |
If you’re shopping or comparing, these are the product links referenced:
Biocharge is missing, readiness score is still there
After updating both the Bip 6 and Active 2 Round, the expected Biocharge feature wasn’t present. Both watches still showed Readiness score instead of Biocharge.
That leaves a few possibilities
- The update pushed out, but the feature flags didn’t activate.
- The update package did not include those features for these models.
- A bug or partial rollout caused the feature to fail to appear.
- It was a blank or incomplete update.
What matters for owners is the end result: even after updating, the big feature change did not arrive on the Bip 6 or Active 2 Round at the time of testing.
The double-press lower button shortcut is also missing
The other missing feature is the new shortcut option for double pressing the lower button.
On the Active 2 Square, you can find it under Settings > Preferences > Shortcut Buttons, and it appears as a third option.
On both the Bip 6 and Active 2 Round, that third option was not available after updating. So even the simple quality-of-life improvement didn’t come through on these models with the versions listed above.
What to do if your watch didn’t get Biocharge
If you updated and you’re trying to figure out whether your watch truly received the feature update, here’s a practical way to check without guessing.
Update checklist
- ✓ Confirm your firmware version in System > About
- ✓ Check Settings > Preferences > Shortcut Buttons for the double-press option
- ✓ Look for Biocharge in the health metrics area (and confirm Readiness didn’t stay)
If you’re on Bip 6 or Active 2 Round and you actually do see Biocharge, that’s useful info because it may mean the rollout is staggered by region or account.
Conclusion
This Amazfit Active 2 Latest Update is a clear win for the Active 2 Square, with Biocharge, a new double-press shortcut, and useful training and sleep improvements.
The rollout is much harder to praise for the Bip 6 and Active 2 Round, because the most important features simply didn’t show up after updating.
If you own one of those two watches and you did get Biocharge, it’s worth sharing what version you’re on and what region you’re in, since that may explain the mismatch.
Curious how the Active 2 stacks up overall? Check out our Amazfit Active 2 Review: Too Good to Be True at $129?.
