3 ms·

I've gotten 2 days of constant use, and it's hardly dropped voltage at all, will likely last 6. The eink screen uses no electricity between screen updates, and

• nucleardog 5y ago
  I've been entertaining myself basically learning some embedded programming on the watchy. I've got mine only waking up once a minute using the external RTC as a trigger. In between I put it in hibernation (~2.5uA to the processor). So every minute it's waking up for about a second to do some updates, redraw the screen, and shut itself back down. (It takes quite a while to refresh the screen.) I haven't had it unplugged more than 24 hours at a time (keep plugging it back in to do some more programming and debugging), but so far the biggest drop I've seen was the battery voltage (rounded to the nearest tenth of a volt) going 4.2 -> 4.1. Even assuming worst case rounding here, that's something like 100% -> 95% battery capacity, so I'm looking at more like 20 days just doing basic time keeping so far.