@freemo @tsia_ The crank is being used to control the games. The battery is actually quite small at 700mAh, but the screen isn’t backlit (but super-reflective, so it doesn’t look dim) so it saves a lot of power when not in use. With one charge you’ll get up to 8 hours of playtime and 1 week of standby time. Here is an introductionary video about the device, explained by the people behind @playdate themselves: https://yt.koyu.space/watch?v=HdF3CnFvxg4