Saw these on special at Kmart so bought one to try out for fun as I have a lot of joycons.
These are surprisingly solidly built and light up Red when charging and green when fully charge.
Holds 4 joycons at once too.
Going to grab another to use them as displays for my joycon collection.
Heads up, there's no way to change the brightness of the light. Once moved mine into a cupboard because it's bloody distracting when trying to watch a movie in a dark room. Otherwise no issues.