To make it easy to connect your phone while keeping the console free of clutter, you can install a phone charging cable in Model 3.
Note: The phone dock supports two phones side-by-side.
To install a phone charging cable:
12V Power Socket
Your Model 3 has a power socket located in the center console's rear compartment.
The power socket is suitable for accessories requiring up to 12A continuous draw (16A peak).
Note: Power is available whenever the vehicle is considered "awake". The vehicle may be awake for many reasons. For example, when using features such as Summon, or when features such as Cabin Overheat Protection, Keep Climate On, Dog Mode, Sentry Mode, etc. are enabled. The vehicle is also awake whenever the 12V battery is being charged or is in use, during HV charging, when the vehicle is communicating with the mobile app, etc.
Leaving an accessory plugged in does not deplete the 12V battery.
Warning: The power socket and an accessory's connector can become hot.
Warning: To prevent excessive interference with the vehicle's electronics, Tesla recommends that you do not plug any non-Tesla accessories, including power inverters, into the 12V power socket. However, if you do use a non-Tesla accessory and notice any malfunctions or unexpected behavior, such as indicator lights, alert messages, or excessive heat from the accessory, unplug the accessory from the 12V power socket immediately.
Caution: Do not attempt to jump start Model 3 using the 12V power socket.
Doing so can result in damage.