4 ms·

I’m shocked they think they can get such long battery life with a heart rate monitor running all the time.

yellingdog 1y ago
I would expect an extremely infrequent heart rate sample rate at idle. I believe the current-gen watches only sample every 10 minutes unless activity is detected.
swiftcoder 1y ago
There are a bunch of weird smartwatches that get pretty close to this - for example, the Amazfit Bip S Lite claims 30 days of battery with a similar transflective screen (albeit I think the heart rate monitor drops to once every measuring 5 minutes in battery saver mode). Similarly, the Withings Scanwatch claims the same, although as a hybrid smartwatch, it is not driving such a power-hungry screen.
- user_7832 1y ago
  I had the OG Bip and got extremely close to 3 months at one point. Unfortunately I don't remember if I had the HR set to 5 minute intervals but if it was on, I think that was the setting. Even with 1 minute intervals though, battery life was absolutely stellar. I'd often lose my charger, and in few days after I saw the battery dropping/low battery alerts, I'd find it too (before the watch died)!
tills13 1y ago
it'll probably pulse on / off. The main draw would be the display but since it's e-ink it only draws when changing.
- mikepurvis 1y ago
  I guess so. I've had two previous fitbits and I believe those track every second during exercise and every five minutes otherwise. But those watches would still only get 5-7 days of battery life. Hence my skepticism that this feature can be offered and still get 4x more life than that.
- micromacrofoot 1y ago
  it's e-paper (reflective lcd), so it does draw some power at all times, but lower without an always on backlight
  - afandian 1y ago
    I don't know if it's the same thing, but Sharp Memory LCD has low quiescent consumption and memory somehow built into the display. https://sharpdevices.com/memory-lcd/ https://sharpdevices.com/memory-lcd/

I would expect an extremely infrequent heart rate sample rate at idle. I believe the current-gen watches only sample every 10 minutes unless activity is detected.

swiftcoder 1y ago

There are a bunch of weird smartwatches that get pretty close to this - for example, the Amazfit Bip S Lite claims 30 days of battery with a similar transflective screen (albeit I think the heart rate monitor drops to once every measuring 5 minutes in battery saver mode). Similarly, the Withings Scanwatch claims the same, although as a hybrid smartwatch, it is not driving such a power-hungry screen.

user_7832 1y ago
I had the OG Bip and got extremely close to 3 months at one point. Unfortunately I don't remember if I had the HR set to 5 minute intervals but if it was on, I think that was the setting. Even with 1 minute intervals though, battery life was absolutely stellar. I'd often lose my charger, and in few days after I saw the battery dropping/low battery alerts, I'd find it too (before the watch died)!

tills13 1y ago

it'll probably pulse on / off. The main draw would be the display but since it's e-ink it only draws when changing.

mikepurvis 1y ago
I guess so. I've had two previous fitbits and I believe those track every second during exercise and every five minutes otherwise. But those watches would still only get 5-7 days of battery life. Hence my skepticism that this feature can be offered and still get 4x more life than that.
micromacrofoot 1y ago
it's e-paper (reflective lcd), so it does draw some power at all times, but lower without an always on backlight
- afandian 1y ago
  I don't know if it's the same thing, but Sharp Memory LCD has low quiescent consumption and memory somehow built into the display. https://sharpdevices.com/memory-lcd/ https://sharpdevices.com/memory-lcd/