Check power for the plug and remote
A rechargeable plug can still use a disposable remote battery.
Read both power labels
Find the device connector and the remote battery type separately. Check whether the battery and cable are included.
Identify the exact connector
USB can describe the wall or computer end of a cable while the device uses a magnetic or pin connector. See the charging connector guide.
Keep the local off control accessible
Learn the off action with the device away from the body before relying on a remote. Check what the manual says about a lost connection.