These are SUPER HANDY when you have multiple dead sets of controllers. They act like wireless "wired" ones when they're dead. I can plug them into the wall w a usb-c and still use the controllers.This is a common problem in our house, controllers can only be plugged in one at a time via the switch, but these can be used as if they were a wired controller with no battery. It's very convenient.All though I rarely store them stacked, they look like a cool little Christmas tree when stacked.