I've lost count of such things that need a daily charge. Mind you I've been into wearables since the PalmOS wristwatch.
It wasn't bad for its day but it ran the little CPU at 16MHz which was far more than was needed for a watch. How do I know this? I wrote apps for it back then.
We have project in Finland making a wearable the connects to all other devices (computers, tablets, home systems, and phones). This wearable is being designed to be both voice and gesture based (with a pico projector), worn from the neck or wrist. We wanted to get some opinions on the device to make it better.