I've couldn't find the answer maybe some of you know. Without buying any other peripherals, how do you charge the Joy-cons? I'm assuming it'll charge when it's attached to the tablet, either when it's in the dock or when it's plugged in over usb-c in handheld mode. But what about when it's on the grip? I know you can buy a charging grip. So does that mean you can't plug in the standard grip to the usb-c? Is the only way to charge the Joy-con is if it's on the tablet?