Previous Apple Watch can do it if you tell it you have afib, but that hurts battery life.
FWIW I have told it I have afib. I used to have problems with battery life, but I find the Series 11 can finally last all day and overnight with always on display+afib/HRV monitoring; and it charges fast enough I can get close to 100% in the shower, meaning it effectively does not have battery issues.
Its position as a health device is underrated in tech circles. As we tech savvy generations age there’s a big market there.
(it is, by the way, an FDA approved class 2 medical device…)
> Longer Workout Battery Life and Faster Charging
Apple Watch Series 12 continues to offer up to 24 hours of everyday battery life9 and now offers up to 10 hours of battery life during an outdoor workout — 25 percent more than the previous model.10
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An increase to 10 hours of workout tells me battery life is better, but maybe not “better enough” to give the 24 hour number an increase (or the higher HRV checking frequency is eating the rest of the gains)