Mi Smart Band 4 is an affordable fitness band from Xiaomi. With this, the fourth iteration of the Mi Band, Xiaomi has introduced a colour display and swim tracking, and still claims to offer 20-day battery life. The Mi Band lineup began with a product that didn't even have a display and now we get a device with an AMOLED colour display and lots of watch faces, which are nice to have. The Mi Smart Band 4 costs a little more than the Mi Band 3[1], but are its new features worth the asking price? We used it for a week to find out.
Mi Smart Band 4 design
The Mi Smart Band 4 has all its electronics in a plastic capsule that fits snugly into a silicone band. The display is on the capsule, and a single capacitive button is below the screen. The base of the capsule has the heart rate sensor and pins for charging. To charge the Mi Smart Band 4[2], you need to take the capsule out of the band and place it in its charger.
The Mi Smart Band 4 capsule does not fit into the charger very well. It kept popping out before eventually slotting in, which was quite annoying. This is the biggest design weakness of this product.
The Mi Smart Band 4 is comfortable to wear for long hours. We wore it throughout the day and while sleeping at night, and never found it to be in the way. The band also offers a secure fit.
The 0.95-inch AMOLED display of the Mi Smart Band 4 is a great feature. Text looks crisp and colours look nice too. We didn't have any issues reading it under...