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.
After months of rumors and speculation, we now know how long you'll be able to wear the Apple Watch for before it needs to be recharged at an outlet. At the Apple Watch's debut event in September, Apple CEO Tim Cook remained coy about its battery life, only vaguely saying it could be worn all day, for any occasion.. At Monday's event in San Francisco, Cook reiterated the Apple Watch will last all-day â but now we know that means up to 18 hours.