Most fitness trackers ask you to choose between a good screen and a battery that actually lasts—the Xiaomi Smart Band 9 Active doesn't make you pick. It pairs a crisp 1.47-inch color display with a smooth 60Hz refresh rate, so scrolling through notifications and stats feels closer to using a phone than a typical band, while still comfortably running for up to 18 days on a single charge.
Day to day, it's built to actually be useful rather than just decorative. With 50 sports modes, continuous heart rate monitoring, SpO₂ blood oxygen tracking, sleep analysis, and stress monitoring, it quietly builds up a clear picture of your health throughout the day and night, not just during a workout. Whether you're going for a run, tracking your sleep quality, or just keeping an eye on your heart rate while you work, it's all logged automatically in the background.
At 16.5g, it's genuinely easy to forget you're wearing it, and with 5ATM water resistance, you don't need to take it off for a shower, a swim, or a sudden downpour. Pair it with the Mi Fitness app on either Android or iOS, and you get a clean, straightforward view of everything the band is tracking, plus access to 100+ customizable watch faces to match your style.
Charging is refreshingly low-effort too—the magnetic charger clips on in seconds and gets the band back to full in under 2 hours, so there's rarely a moment where it's actually out of action.
For anyone who wants real fitness and health tracking without the price tag or bulk of a full smartwatch, the Xiaomi Smart Band 9 Active hits a genuinely useful middle ground.
Key Features
1.47-inch TFT colour display — bright, clear, and easy to read at a glance
60 Hz high refresh rate — smooth scrolling and navigation, not the laggy feel of older trackers
Up to 18 days battery life — charge it every couple of weeks, not every couple of days
50 sports modes — covers everything from running and cycling to swimming and strength training
24/7 heart rate monitoring — continuous tracking, not just during workouts
SpO₂ blood oxygen monitoring — keep an eye on a key health metric around the clock
Advanced sleep tracking — breaks down sleep quality, not just hours slept
Stress monitoring — helps you notice patterns in daily stress levels
5 ATM water resistance — safe for swimming, showering, and everyday wear
100+ customizable watch faces — make it look the way you want, day to day
Bluetooth 5.3 connectivity — stable, efficient pairing with your phone
Lightweight 16.5g design — barely noticeable on the wrist
Mi Fitness app support — clean, simple app for reviewing all your stats
Android & iOS compatible — works whichever phone ecosystem you're in
Specifications
| Spec |
Detail |
| Brand |
Xiaomi |
| Model |
Smart Band 9 Active |
| Display |
1.47-inch TFT |
| Resolution |
172 × 320 pixels |
| Refresh Rate |
60Hz |
| Battery Capacity |
300mAh |
| Battery Life |
Up to 18 days |
| Charging |
Magnetic charging |
| Charging Time |
Under 2 hours |
| Bluetooth |
5.3 BLE |
| Water Resistance |
5ATM |
| Sensors |
PPG heart rate sensor, accelerometer |
| Sports Modes |
50+ |
| Weight |
16.5g (without strap) |
| Compatibility |
Android 8.0+ / iOS 14.0+ |
| App |
Mi Fitness |
| Condition |
New |
Frequently Asked Questions
Xiaomi rates it for up to 18 days on a single charge, which lines up well with typical everyday use. That said, if you're leaning heavily on things like heart-rate tracking, notifications, and workout logging, expect that number to drop a bit—how you use it makes a real difference.
The watch is 5ATM rated, meaning that it will easily survive swimming, rainfall, or occasional splashes. It is not recommended, however, to go diving or put it in high-pressure water conditions, as it is not designed for that.
Yes, it plays nicely with both. Whether you're on iPhone or Android, you pair it through the Mi Fitness app and get access to all the core fitness and health-tracking features either way.
Under two hours, start to finish, using the included magnetic charging cable. The magnetic clip makes it easy to pop on and off whenever you need a quick top-up.
Yes, it monitors my sleep patterns at night and saves the information into the Mi Fitness application, from where I can see the trend of my sleep.
It does. You can check your blood oxygen levels right on the band. Worth keeping in mind, though—this is meant for general wellness insight, not as a substitute for medical-grade equipment.
There are 50 sports modes on offer, covering everything from running and cycling to swimming, strength training, and yoga. Just note that the exact data you get back will vary a bit depending on which activity you pick.
It's got a 1.47-inch TFT display running at 60Hz, so day-to-day it looks smooth and clear. Like most TFT screens on fitness trackers, though, it can be a little harder to see in direct, bright sunlight.
Sure, there is a variety of watch faces to pick from within the Mi Fitness app, so you have an opportunity to diversify and personalize your experience with the smart band even more.
Yes, it tracks the level of stress that you experience during the day, displaying the information in the app. That is a great feature to know about your general health condition, not some clinical stuff.
Just around 16.5g without the strap—genuinely light. That makes it comfortable to wear all day, through workouts, and even overnight while it's tracking your sleep.
Yes, you'll need the free Mi Fitness app to get the most out of it. It's where you view your health and fitness data, tweak settings, customize watch faces, and access everything else—and it works on both Android and iOS.
