Nintendo Switch Joy-Con Charging Grip
It comes with a USB-C cable.
I bought a used one and it's my favorite accessory. I haven't had any issues in the 8 months I've used it. It's super convenient for when my Joy-Cons are dying and my others aren't charged.
Yes since the joycons are slid into it, however it charges with a usbc cable
No you can’t but you wouldn’t even have to, it automatically connects to the switch so that would serve no purpose.