Battery and charging
Eighteen days is the figure for ordinary wear: the display on, sleep tracking each night and an hour of exercise a day.
How we measure
A new watch is charged to full and worn until it switches itself off. With position trackingSatellite positioning, switched on only while a workout runs. on for every workout the figure is nearer eleven days. Low power mode, set with Settings › Battery, stretches it to forty.
Charging
- Magnetic puck, any 5 W supply.
- Ten minutes of charge gives about three days.
- The cell keeps 80% of its capacity after 1,000 full cycles.