Cart
POPULAR CATEGORY
Tesla
PartsForMachines supplies 12V auxiliary battery replacements for Tesla vehicles, the small low-voltage battery that runs a Tesla's locks, lights, infotainment and the contactors that wake the high-voltage pack, listed for direct trade order. The catalogue is indexed by model and build period, because that is what determines the correct unit.The context matters: every Tesla carries a separate 12V auxiliary battery alongside the drive battery, and it is a routine service replacement over the vehicle's life. Early Model 3 and Model S cars use lead-acid auxiliary units, later Model 3 and Model Y builds moved to lithium low-voltage batteries, and the replacement must match the vehicle's build, not just its model name. The Model 3 12V battery is the dominant demand, with Model S and the wider range covered, cross-referenced from OEM sources to equivalents from established battery manufacturers. Each product page lists the models and build periods served, dimensions and terminal layout, with Compare lining up options and Ask Simon confirming the right unit from the vehicle's VIN or build date before ordering.
A failing 12V battery is the classic cause of a Tesla that won't wake, won't unlock or throws low-voltage warnings while the main pack sits healthy, which is why this small battery generates the demand it does. Units listed are supplied through established channels with the manufacturer's standard warranty, and fitment confirmation before ordering is the step that prevents the wrong-chemistry mistake.
