Xiaomi Watch S4 41mm review
This review measures the Xiaomi Watch S4 41mm against the full 32-spec sheet we track for smartwatches, comparing it like for like with the 28 other models in our database. It earns a VS Score of 51 out of 100 — the weighted result of every verified specification measured against the class average.
On the spec sheet it is strongest in battery and weakest in connectivity. Its clearest single advantage over the class average: 72.52 h more battery life — 192 h vs 119.48 h (avg). None of our retail partners currently lists the Xiaomi Watch S4 41mm, so availability may be limited; a missing price never affects the VS Score. A transparency note: this spec sheet is 75% complete. Anything unverified shows as Unknown and is left out of the score — we never estimate a missing value.
Category strengths
Where the Xiaomi Watch S4 41mm beats the average
- 72.52 h more battery life ?192 h vs 119.48 h (avg)
- Has blood pressure ?
- 10.62 g less weight ?32 g vs 42.62 g (avg)
- Has skin temperature ?
- Has NFC payments ?
- Has blood oxygen (SpO2) ?
- Has fall detection ?
- Has speaker & microphone ?
Where the Xiaomi Watch S4 41mm trails the average
- No ECG ?
- No Wi-Fi ?
- No wireless charging ?
- 0.37 " less display size ?1.32 " vs 1.69 " (avg)
- 1.11 ATM less water resistance ?5 ATM vs 6.11 ATM (avg)
- 231.03 nits less peak brightness ?2,200 nits vs 2,431.03 nits (avg)
- 4.48 mm less case size ?41.2 mm vs 45.68 mm (avg)
- 13.52 px less resolution ?466 px vs 479.52 px (avg)
- 0.03 less Bluetooth version ?5.4 vs 5.43 (avg)
Specifications
Quality bars are generated automatically against 28 other smartwatches.
Design
A lighter watch is more comfortable to wear all day.
The case diameter; larger cases fit bigger displays, smaller ones suit slimmer wrists.
The case material (e.g. aluminium, titanium).
A higher ATM rating allows swimming and diving.
Shows the time and stats without raising your wrist.
A scratch-resistant sapphire crystal protects the screen.
The case and band colour options the watch is sold in.
Display
A larger display is easier to read and interact with.
A higher pixel count produces sharper text and graphics.
The screen technology (e.g. AMOLED).
A brighter screen is easier to read in sunlight.
Health & fitness
Continuously tracks your heart rate.
Measures blood-oxygen saturation.
Takes an electrocardiogram to check heart rhythm.
Estimates blood pressure from the wrist.
Monitors sleep stages and quality.
Tracks routes and distance without a phone.
Senses skin temperature for health insights.
Detects hard falls and can call for help.
More tracked workout types suit more activities.
Battery
Estimated hours of use between charges.
Tops up quickly from empty.
Charges on a wireless pad or puck.
How long a full charge takes; lower is better.
Connectivity
A newer Bluetooth version improves range and efficiency.
Connects to Wi-Fi for updates and sync without a phone.
L1+L5 GPS gives more accurate tracking in cities and forests.
Make calls and stream without your phone nearby.
Pay contactlessly from your wrist.
Take calls and use a voice assistant on the watch.
Software
The watch software platform.
More storage holds more offline music and apps.
How the VS Score works — and what it can’t tell you
Every measurable spec is scored against the average of all the smartwatches we track: matching the class average scores 50, clearly beating it climbs towards 100, and each spec counts according to an editorial weight that reflects real-world impact — a battery-capacity gap moves the score far more than a colour-options list. The quality bars on the spec cards above show where this model sits inside the full range for its class, and the overall VS Score rolls every weighted result into one number.
Unknown values are never estimated. A spec this product doesn’t report simply drops out of its scoring — it isn’t penalised with a guess — but a thinner spec sheet does mean a score built on fewer data points, which is why completeness is disclosed under About this data.
Most importantly: a spec-sheet lead is not the same as a better product. Megapixels, gigahertz and benchmark points describe capacity, not experience — image processing, software optimisation, thermals, haptics and ergonomics decide how a device actually feels, and no table captures reliability or long-term support quality. Treat the VS Score as a structured summary of what can be measured, not a substitute for your own priorities.
About this data
- Specifications are compiled from each manufacturer’s official spec sheet, cross-checked against trusted specification databases, and normalised into one schema so identical things are compared identically.
- Specifications last verified July 8, 2026.
- Data completeness: 24 of the 32 specs in this category are verified (75%). Anything we could not verify is shown as Unknown — never estimated — and is excluded from the score.
- Prices and availability come from live retailer feeds via our shopping partners and refresh throughout the day; a missing price means no partner currently lists the product, not that it is discontinued.
- Want the full picture? Our editorial guidelines explain how we research products, weight the scores and stay independent.
- Spotted an error in a spec? Tell us and we will correct the sheet.
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The bottom line
The Xiaomi Watch S4 41mm earns a VS Score of 51, a solid mid-pack result among the 29 smartwatches we compare here. It stands out for 72.52 h more battery life, has blood pressure and 10.62 g less weight. Just be aware of no ECG and no Wi-Fi before you buy. Weigh those trade-offs against what matters most to you.
The VS Score is generated automatically from the weighted specifications above, measured against all other smartwatches in our database. Treat it as a shortlisting guide — not a substitute for your own priorities.
