Xiaomi Watch S5 41mm Tested: Small Body, Long Battery
The Xiaomi Watch S5 41mm is a compact smartwatch with a 1.32-inch OLED screen rated at 3,000 nits, a 590mAh battery, and a 36g body without the strap. Xiaomi claims up to 14 days of typical battery life, or around 8 days with heavier health tracking, and the watch runs HyperOS 4. It also includes temperature sensors, menstrual-cycle tracking, and sun-protection features.
Small smartwatches force designers to reconcile cramped interiors with expected capabilities, since space constraints can influence battery size, screen area, sensor layout, and performance. The Xiaomi Watch S5 41mm addresses that tension through a 41mm case, 9.9mm profile, and 36g weight without a strap, paired with a 1.32-inch OLED panel rated at 3,000 nits.
Its 590mAh cell is rated for up to 14 days in typical use or roughly 8 days with more intensive health tracking. The watch runs HyperOS 4 and adds three temperature sensors, menstrual-cycle tracking, sun-protection tools, and a Sunwalk face that reflects UVA conditions and shows UVA/UVB data.
Compact wearables like this may appeal to people with smaller wrists, overnight trackers, and users seeking less bulky fitness devices. Features such as menstrual-cycle tracking, temperature sensing, and UV guidance could make health monitoring more accessible in daily life, though accuracy and usefulness would still matter. If such models perform well, they may encourage manufacturers to treat comfort, battery life, and women-focused health tools as mainstream priorities rather than niche additions. Consumers could benefit from more choice, but may also face trade-offs between smaller screens and advanced capabilities.