While an autopsy, undertaken the same day Presley died, was still in progress, Memphis medical examiner Dr. Jerry Francisco announced that the immediate cause of death was cardiac arrest. Asked if drugs were involved, he declared that drugs played no role in Presley's death.
Power Reserve notification (left), Charging the Apple Watch (middle and right). As for charge times, Apple says it takes about 1.5 hours to reach 80% and up to 2.5 hours for a full 100% charge. Real-world Watch battery performance.
General Battery Information. Apple Watch is so capable youâll want to wear it all day long. So we made sure we gave it a battery that lasts all day, too. Our goal for battery life was 18 hours after an overnight charge, factoring in things like checking the time, receiving notifications, using apps, and doing a 30âminute workout.