Charging each day for the approximate times shown below should be enough to maintain a charge of or higher.
At a charge of , all watch functions are supported, except for GPS.
Sunny day, outdoors (50,000 lux): 12 minutes/day
Sunny day, near a window (10,000 lux): 45 minutes/day
Overcast day, near a window (5,000 lux): 72 minutes/day
Charging with the Charger