Apple Watch Series 12 Review: S11 Chip and Up to 50 Hours of Battery

A review of the Apple Watch Series 12 in 42mm and 46mm sizes with the new S11 chip based on A20 Pro architecture. Apple claims over two days (about 50 hours) of battery life, redesigned heart rate sensors taking readings every five seconds, and a Readiness Score from 0 to 10.

• S11 chip based on A20 Pro architecture, display up to 2,000 nits
• About 50 hours of battery life, full charge in roughly an hour
• Background heart rate every 5 seconds, HRV 24 times more frequent
• Readiness Score needs 7 nights of sleep data for a baseline