Battery life on Apple Watch used to monitor sleep
If I buy a new apple watch 10 or 11 or ultra and wear it to monitor my sleep how long does it take to recharge battery so it works during the day
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I have a Series 11 watch. At night, say when taking a short shower and getting ready to sleep, I charge the watch, it usually is between 80% and 100% after that brief (maybe 20 min or so) charge. Sometimes it may indicate that it will stop at 80% to conserve the battery life, if it does that I tell it to "charge to full now" which results in a rapid charge that ends close to 100%.
With the watch on for "sleep" all night, the next morning it seems to be about 20% lower than before "sleep." Then I charge it again for 15-20 minutes while doing other things first thing in the morning and it is then at or close to 100%.
Apple advertises up to 24 hours battery life for Series 11 and up to 42 hours for Ultra. I used to worry about this a bit because I got the Series 11. But I wear my watch all day, usually include a 2-3 hour bicycle "workout" most days, sometimes walking workouts as well, and am well connected (GPS, cellular, WiFi) almost all the time. I have never seen it go below 50% yet (have had it for only one month) but it is on all the time except for showers (when I charge it for ~ 15-20 minutes) and first thing in the morning when I charge it for ~ 20-30 minutes. It is on all night for "sleep" monitor (a new fangled function I have never seen before and am getting used to).
I ended up with the Series 11 watch not because cause of battery lifetime, but because it had the functions I wanted the most. The Ultra seemed better suited to sea divers and ultra-exercise/sports people ... I try to exercise regularly, but am not that obsessed and really wanted an all around capability. The Ultra is also larger, bulkier, and costs much more. I think it would be less comfortable if worn all night during sleep. I found the Series 11 battery life to be a non-issue when I can charge it for one (or two) short period each day. Sometimes events intervene and I can't charge it on a given day, in which case the charge drops lower but so far at least, never been a problem. My use of the watch seems to be getting somewhat more than the advertised 24 hours that Apple says.