Reminds me of Playdate [https://play.date/ https://play.date/], a handheld game device, that had a crank on the side. Unfortunately, I don't think you could ch

Reminds me of Playdate [https://play.date/ https://play.date/], a handheld game device, that had a crank on the side. Unfortunately, I don't think you could charge the batteries by winding the crank.