Watches Top 10s

Smartwatch batteries: a first look

Watches have small batteries working hard on your wrist all day.

So we were curious: which ones go the distance?

These lists come from people using 3C battery apps on their watch who chose to share a little anonymous battery information.

A friendly heads-up: this is an early peek.

Far fewer watches than phones have shared data so far, so a watch can appear here once just 2 people have shared.

That’s lovely for getting started, but a single watch having a great (or not so great) day can still move things around. Take these rankings with a pinch of salt for now.

They’ll become more reliable with every watch that joins.

The lists work the same way as for phones:

  • Battery health: how much of its original capacity the battery still holds.
  • Standby and screen-on time: how long a full charge would last.
  • Slowest aging: which batteries wear out the slowest.
  • Efficiency: which watches use the least power.

Not sure which list matters to you? If you’d love to charge your watch less often, look at standby time. Use it a lot for workouts or maps? Screen-on time. Want the most from every charge? Efficiency, a bit like an A+++ energy label. Keeping your watch for years? Slowest aging. More in Which battery stats matter for you?

Wearing a smartwatch? You can make this page better for everyone. Install 3C battery apps on your watch and turn on community sharing. Every watch counts! ⌚

Battery health

Measured capacity as a share of the advertised capacity.

  1. 1Pixel Watch 4Google · 2025 · 5 devices105.3%
  2. 2OnePlus Watch 3OnePlus · 2025 · 6 devices96.8%
  3. 3Galaxy Watch5 ProSamsung · 2022 · 4 devices95.7%
  4. 4Xiaomi Watch 2Xiaomi · 2024 · 2 devices85.9%
  5. 5Xiaomi Watch 2 ProXiaomi · 2023 · 2 devices79.9%

Standby time

How long a full charge lasts at the measured screen-off drain.

  1. 1OnePlus Watch 3OnePlus · 2025 · 6 devices6d18h
  2. 2OnePlus Watch 4OnePlus · 2026 · 2 devices5d21h
  3. 3Galaxy Watch5 ProSamsung · 2022 · 4 devices2d22h
  4. 4TicWatch Atlas;TicWatch Pro 5;TicWatch Pro 5 EnduroMobvoi · 2 devices2d12h
  5. 5Pixel Watch 4Google · 2025 · 5 devices2d11h
  6. 6Pixel Watch 3Google · 2024 · 7 devices2d6h
  7. 7Xiaomi Watch 2Xiaomi · 2024 · 2 devices1d22h
  8. 8Pixel Watch 2Google · 2023 · 5 devices1d18h
  9. 9Xiaomi Watch 2 ProXiaomi · 2023 · 2 devices1d5h
  10. 10Galaxy Watch4 Classic (46Mm)Samsung · 2021 · 2 devices19h53m

Screen-on time

How long a full charge lasts at the measured screen-on drain.

  1. 1TicWatch Atlas;TicWatch Pro 5;TicWatch Pro 5 EnduroMobvoi · 2 devices10h33m
  2. 2Galaxy Watch4 Classic (46Mm)Samsung · 2021 · 2 devices6h42m
  3. 3Galaxy Watch5 ProSamsung · 2022 · 3 devices4h19m
  4. 4Xiaomi Watch 2Xiaomi · 2024 · 2 devices4h17m
  5. 5Pixel Watch 4Google · 2025 · 4 devices3h20m
  6. 6Pixel Watch 3Google · 2024 · 5 devices2h46m
  7. 7Pixel Watch 2Google · 2023 · 4 devices2h22m
  8. 8OnePlus Watch 3OnePlus · 2025 · 6 devices2h21m
  9. 9Xiaomi Watch 2 ProXiaomi · 2023 · 2 devices2h16m

Slowest aging

Capacity lost per year of battery age - lower is better.

  1. 1Galaxy Watch5 ProSamsung · 2022 · 4 devices0.0%/yr
  2. 2OnePlus Watch 3OnePlus · 2025 · 6 devices3.0%/yr
  3. 3Pixel Watch 4Google · 2025 · 5 devices3.1%/yr
  4. 4Xiaomi Watch 2Xiaomi · 2024 · 2 devices5.3%/yr
  5. 5Pixel Watch 3Google · 2024 · 7 devices5.8%/yr
  6. 6Xiaomi Watch 2 ProXiaomi · 2023 · 2 devices6.2%/yr
  7. 7Pixel Watch 2Google · 2023 · 5 devices9.0%/yr

Standby efficiency

Average power drawn with the screen off - lower is better.

  1. 1OnePlus Watch 3OnePlus · 2025 · 6 devices15 mW
  2. 2Pixel Watch 4Google · 2025 · 5 devices33 mW
  3. 3Xiaomi Watch 2Xiaomi · 2024 · 2 devices37 mW
  4. 4Galaxy Watch5 ProSamsung · 2022 · 4 devices39 mW
  5. 5Xiaomi Watch 2 ProXiaomi · 2023 · 2 devices79 mW

Screen-on efficiency

Average power drawn with the screen on - lower is better.

  1. 1Xiaomi Watch 2Xiaomi · 2024 · 2 devices0.55 W
  2. 2Pixel Watch 4Google · 2025 · 4 devices0.70 W
  3. 3Xiaomi Watch 2 ProXiaomi · 2023 · 2 devices0.72 W
  4. 4Galaxy Watch5 ProSamsung · 2022 · 3 devices1.82 W
  5. 5OnePlus Watch 3OnePlus · 2025 · 6 devices2.67 W

Averages over 45 devices whose owners shared their battery data anonymously from a 3C app - each entry is backed by at least 2 devices. Updated 2026-11-14. A self-selected sample: indicative, not a lab measurement. Tap a device to see how its results spread.

Not ranked yet

These models have shared battery data, but from fewer than 2 devices - too few for an average worth publishing, so none of their figures are shown. Own one? Turn on community data sharing in 3C Battery Manager or another 3C app: a device starts counting once the app has about two weeks of charge history, and each one brings its model closer to the lists above.

Show all 8 models not ranked yet
  • Pixel WatchGoogle · 1 more device needed
  • Pixel Watch 2Google · enough devices - counted in the rankings
  • Pixel Watch 3Google · enough devices - counted in the rankings
  • Pixel Watch 4Google · enough devices - counted in the rankings
  • TicWatch Atlas;TicWatch Pro 5;TicWatch Pro 5 EnduroMobvoi · enough devices - counted in the rankings
  • TicWatch E3Mobvoi · 1 more device needed
  • TicWatch Pro 5 EnduroMobvoi · 1 more device needed
  • OnePlus Watch 2ROnePlus · 1 more device needed
  • OnePlus Watch 3OnePlus · enough devices - counted in the rankings
  • OnePlus Watch 4OnePlus · enough devices - counted in the rankings
  • Galaxy Watch4 (44Mm)Samsung · 1 more device needed
  • Galaxy Watch4 Classic (46Mm)Samsung · enough devices - counted in the rankings
  • Galaxy Watch5 ProSamsung · enough devices - counted in the rankings
  • Galaxy Watch6 (40Mm)Samsung · 1 more device needed
  • Galaxy Watch6 Classic (47Mm)Samsung · 1 more device needed
  • Galaxy Watch7Samsung · 1 more device needed
  • Xiaomi Watch 2Xiaomi · enough devices - counted in the rankings
  • Xiaomi Watch 2 ProXiaomi · enough devices - counted in the rankings

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