The remote that comes with your Apple TV has a rechargeable battery inside. With typical usage, you’ll need to charge it a few times a year. An alert appears on the TV screen when the remote battery is running low. You can also check the battery level in Settings.
Note: You can continue to use the remote while it’s charging.
Connect one end of a USB-C or Lightning cable to the port on the bottom of your remote.
Connect the other end of the cable to a computer USB-C or USB port or to an Apple USB-C or USB power adapter (sold separately).
The remote takes about three hours to fully charge.