Apple Watch Ultra 4 review: new sensors and two-day battery life

The Apple Watch Ultra 4 review highlights redesigned ECG electrodes and optical sensors for better accuracy, with heart rate recorded every five seconds and a two-minute history. Battery life reaches two days with cellular use and nearly four in low power mode. Price starts at Rs 1,09,900 in India.

• Heart rate recorded every 5 seconds with 2-minute history
• Battery lasts 2 days, nearly 4 in low power mode
• watchOS 27 surfaces most-used apps via the crown
• India price starts at Rs 1,09,900