Odd, the battery life in the series 2 is fine. I would like it a bit thinner.
What about a special band with extra battery to be used for sleep? Charge the sleep band during the day, then wear the watch at night for sleep tracking. It charges the watch at night and drains the band battery.
What about a special band with extra battery to be used for sleep? Charge the sleep band during the day, then wear the watch at night for sleep tracking. It charges the watch at night and drains the band battery.