Xiaomi Mi Band 4

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Xiaomi Mi Band 4 review: The big picture

The Xiaomi Mi Band 3 was one of the best value fitness trackers of 2018, and the Mi Band 4 aims to improve on it in a few key ways. It has a better display and more activity profiles, but with those things comes a slight price bump, though the Mi Band 4 is still significantly cheaper than other fitness trackers with similar feature sets.

Design

Let’s be honest: None of Xiaomi’s Mi Band devices have ever been the most well-designed pieces of tech, but the Mi Band 4 is an improvement. It’s still one of the more generic-looking fitness trackers out there with its simple black band and unassuming case, but the improved display saves the Mi Band 4’s design in my opinion.

It’s a 0.95-inch RGB AMOLED display this time around — a big step up from the Mi Band 3’s smaller black-and-white display. The 120 by 240-pixel density is sharp and the 400-nit brightness means it’s easy to see in direct sunlight. It’s a touchscreen display, so you’ll do most of your on-device navigation through taps and swipes. Swipe up or down to select different modes or settings, swipe left or right from the watch face to access music controls, or swipe right to go back from a different screen. You can also tap the capacitive button underneath the display to go back. Easy.

Let’s be honest: None of Xiaomi’s Mi Band devices have ever been the most well-designed pieces of tech, but the Mi Band 4 is an improvement. It’s still one of the more generic-looking fitness trackers out there with its simple black band and unassuming case, but the improved display saves the Mi Band 4’s design in my opinion.

It’s a 0.95-inch RGB AMOLED display this time around — a big step up from the Mi Band 3’s smaller black-and-white display. The 120 by 240-pixel density is sharp and the 400-nit brightness means it’s easy to see in direct sunlight. It’s a touchscreen display, so you’ll do most of your on-device navigation through taps and swipes. Swipe up or down to select different modes or settings, swipe left or right from the watch face to access music controls, or swipe right to go back from a different screen. You can also tap the capacitive button underneath the display to go back. Easy.

The Xiaomi Mi Band 4 received a software update in October 2019 that added the ability to set a custom screen timeout between 5 and 10 seconds. With that 1.0.7.04 update, Xiaomi also brought new watch faces and improved swim tracking to the Mi Band 4. A mid-January 2020 update to version 1.0.9.22 brought bug fixes to the Mi Band 4. We couldn’t find an official changelog for the update, though a Reddit thread said notification text is smaller after the update.

The fitness tracker case easily detaches from the silicone band if you’d like to swap it out for another band. And don’t worry, there are already plenty of third-party Mi Band 4 bands available on Amazon. The Mi Band 4 case is compatible with Mi Band 3 bands, too.

The band that ships with the Mi Band 4 is made of silicone and feels comfortable. It’s not the highest quality rubber you’ll find on a fitness tracker — it’s a little too rigid for my taste — but it gets the job done.

The optical heart rate sensor ever-so-slightly protrudes from the bottom of the case, but not enough to leave a mark on your wrist after wearing it for a few hours.

Throughout my testing, I didn’t notice any connectivity issues between the Mi Band 4 and my Pixel 3. Perhaps that’s due to the Mi Band 4’s updated Bluetooth 5.0 support compared to the previous generation’s Bluetooth 4.2 support.

Below the heart rate sensor sit two little pins for charging. When it’s time to charge, simply slide the Mi Band 4 case into the included charging cradle and it should be topped up in about 45 minutes. A quick note on the charging cable: I hate it. It’s about four inches long, so it’s going to dangle from any USB charging port not sitting directly on a desk.

The good news is you won’t have to charge the Mi Band 4 very often at all. With normal use, Xiaomi says the 135mAh battery will last about 20 days on a single charge. I haven’t been using mine for 20 days, but I can tell you the battery is pretty great so far. I’m currently sitting at a 70% charge after a full charge last Friday, and that’s after three long runs and the heart rate sensor being on in 10-minute intervals.

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NOTE: Please allow up to 2-6 weeks (depending on location - US takes 7-14 days) for your package to arrive at your doorstep because shipping has been delayed due to extremely high demand and we're now shipping directly from our manufacturer.