New Apple Watch Series 12 and Ultra 4 sensors don't hurt battery life

Macworld tested the Apple Watch Series 12 and Ultra 4 with new sensors: heart rate is measured every 5 seconds instead of every 5 minutes, and HRV every 5 minutes instead of every 2 hours. Despite the higher background activity, power draw barely increased: over 5.5 hours the Series 12 used 0.190 Wh versus 0.248 Wh for the Series 11.

• Heart rate measured every 5 seconds instead of every 5 minutes
• HRV measured every 5 minutes instead of every 2 hours
• Series 12 used 0.190 Wh over 5.5 hours vs 0.248 Wh on Series 11
• Series 12 background activity: 15 minutes per hour vs 13 on Series 11