In this article
Architecture & Specifications
The Xiaomi Watch 5 relies on an AMOLED screen (AMOLED is a type of OLED panel with active pixel control, known for deep blacks and good efficiency) of 1.54 inches, with 60 Hz, 480×480 resolution and announced brightness of up to 1,500 nits. In practice, 60 Hz tends to deliver smoother navigation than 30 Hz in animations and lists, and the peak brightness suggests better readability outdoors — though the actual experience depends on automatic control and watch face type. The body is stainless steel, measuring 12.3 mm thick and 56 g without the strap. There's also an uncommon detail: synthetic sapphire crystal glass on both front and back. Synthetic sapphire is a hard material, scratch-resistant; it doesn't make the watch "indestructible", but it reduces marks from daily use. Water resistance is 5ATM (suitable for pool swimming and everyday use; it is not a guarantee for diving with a tank). The operating system is Xiaomi HyperOS 3, and the hardware foundation uses two chips: a Qualcomm Snapdragon W5 as the main SoC and a Hengxuan 2800 for low power. The logic here is straightforward: the "powerful" chip handles heavier tasks (interface, apps, connectivity), while the efficient chip takes on continuous routines (sensors, watch faces, background tasks) to save power.Health, sport and the ECG "trick"
In sensors, Xiaomi lists continuous heart rate monitoring, ECG, SpO₂, stress and sleep monitoring, plus support for over 150 sport modes. The set covers the essentials for training and wellbeing, but it's worth distinguishing between "having the sensor" and "having clinical validation": measurements like ECG and SpO₂ can vary with strap adjustment, skin, movement and algorithms, and usefulness also depends on how the app interprets trends. The Watch 5 includes colour offline maps and features designed for running. For those training outdoors, offline maps reduce reliance on mobile data and can be useful on new routes — provided the mapping and GPS are well tuned. The most unusual point is the use of the ECG sensor for gesture control: the watch detects muscular signals from the hand and enables actions like answering calls, dismissing alarms, taking remote photos and controlling music. In theory, this can be more reliable than gestures based solely on accelerometer/gyroscope during movement; in practice, reliability will depend on calibration, wrist position and what Xiaomi allows you to configure.Connectivity: what changes with eSIM
The Watch 5 brings Bluetooth 5.4, Wi-Fi, NFC, GPS and eSIM. eSIM is a "digital SIM" embedded in the device, which allows connection to a mobile network without a physical card. For the user, this can mean calls and messages without carrying a phone, useful for running, the gym or short trips. However, there are two practical implications worth noting: (1) compatibility with operators and eSIM plans in the country where the watch is used; (2) impact on battery when the mobile connection is active. Xiaomi announces 6 days on normal use and 18 days in power-saving mode, but doesn't detail the usage profile with eSIM always on, which is usually the most demanding scenario.Autonomy and power management
The battery is 930 mAh, with a promise of up to 6 days on normal use and up to 18 days in power-saving mode. Without a public protocol (brightness, Always-On Display, GPS, eSIM, number of workouts), these values should be read as reference and not as guarantee. Still, the combination of dual chips and an AMOLED panel can help maintain a reasonable balance between features and consumption. For those who use GPS and maps frequently, consumption tends to rise; for those who prioritise notifications and continuous monitoring, the watch may approach the "normal" scenario more closely. The real difference usually lies in three invisible buttons: always-on display, GPS workouts and mobile connectivity.Pricing, variants and what to watch before buying
In China, the version with rubber strap is listed at CNY 1,999. The variant with eSIM and leather strap comes at CNY 2,299. There's also a titanium strap (TC4 alloy) produced by 3D printing, announced at CNY 799, in black or silver to match the case. These prices are from the Chinese market and don't include taxes, fees or any price adjustments in other countries. Before making a decision, it makes sense to consider three points: (1) whether eSIM works with your operator and if the plan cost is worthwhile; (2) whether health features (like ECG) are active and supported in your region; (3) warranty policy and returns when you shop online. For editorial transparency, the base information was provided by the original source: GSMArena article.FAQ
- Will the Xiaomi Watch 5 work with eSIM in Portugal?
- It's a possibility, but it depends on two variables: model availability and compatibility with local operators and eSIM plans. Without official confirmation for the Portuguese market, it's worth validating before purchasing.
- Do the 6 days of battery include eSIM and GPS always on?
- It wasn't detailed. On watches with eSIM, battery life typically drops when the mobile connection is active and when there are GPS workouts and brighter display.
- What does 5ATM mean in practice?
- It indicates adequate resistance for everyday use and pool swimming. It's not a certification for deep diving nor does it replace care with salt water, steam or buttons pressed underwater.
- Does the watch ECG serve for medical diagnosis?
- The source text does not indicate clinical validation or regulatory status. In general, ECG on wearables is useful for screening and event logging, but does not replace medical evaluation.
- How do gestures work with the ECG sensor?
- Xiaomi claims the sensor can detect muscular signals from the hand to perform actions (answer calls, dismiss alarms, etc.). Reliability should depend on calibration, wrist fit and software implementation.
Read also
Get more articles like this one.
Refurbished tech analysis + €5 with BEMVINDO5 on your first order.
Refurbished tech with warranty
iPhones, MacBooks, iPads and more, tested and certified, with a 24-month warranty.
24-month warrantyShipping up to 8 business days
See products →
