12 Volt Battery in the trunk
There is an AGM 12 Volt motorcycle battery buried underneath the right front headlight, behind a fender skirt, which powers all the 12 volt devices in the Roadster. These batteries need to be replaced every two years, which is usually a trip to a Tesla Service Center.
We have developed a battery relocation to the trunk, in an accessible housing, with a meter showing battery condition. Replacement now is DIY, and takes only a few minutes.