Apple Watch Ultra 4 · Reported Feature

72+ hours of battery

What we’re expecting

Ultra 3 already offers 72 hours in Low Power Mode, and multiple leakers suggest Ultra 4 targets 72+ hours as its standard battery life. The thinner design would demand real efficiency gains to get there.

Apple Watch Ultra 3 was the first Ultra to get a battery bump, and now Ultra 4 is rumored to push past 72 hours. Two generations in a row of improvements is a streak worth watching, the original Ultra launched in 2022 with 60 hours and sat there for two years.

iDevice Confidence

Expected

Multiple credible reports point to this landing.

How does Apple Watch Ultra 4's battery life compare?

Standalone runtime per charge, longer is better.

Galaxy Watch Ultra 2
~72hrs est. (~800mAh leaked)
Samsung Galaxy Watch 9
~50hrs est (40mm) / +30% vs Watch 8
Galaxy Watch Ultra (current)
Up to 48 hours (590mAh)
Apple Watch Ultra 3
Up to 42 hours
Samsung Galaxy Watch 8
Up to 40 hours (40mm)
Apple Watch Series 12
Improved (est. 24–36 hrs)
Pixel Watch 4
~30hrs (41mm) / ~40hrs (45mm)
Apple Watch Series 11
Up to 24 hours

Tethered and USB-C-powered devices excluded (no standalone rating).

Sources reporting this (1)

Apple Watch Ultra 4: Four rumored new features coming this fall9to5Mac · Jun 17, 2026