Tesla Model 3 low-voltage battery: identify the generation.
Can every Tesla Model 3 use the same replacement 12V battery?
No. Tesla's North American 2017–2023 Model 3 owner's-manual archive identifies an older 12V 45 Ah AtlasBX/Hankook 85B24LS lead-acid battery, and warns that later Model 3 builds moved to lithium-ion low-voltage batteries.
Applicable to: North American Tesla Model 3 2017–2023 legacy owner-manual edition; the source explicitly differentiates production factory and date. Not an instruction to fit lead-acid to a later lithium-equipped car.
Manufacturer-specified figures by configuration
These are manufacturer-referenced values for the named configurations only. Read the exact source for your engine, trim and market instead of carrying a measurement across model names or model years.
| Vehicle configuration | Published value | Context and limits | Manufacturer evidence |
|---|---|---|---|
| Earlier North American Model 3 · lead-acid low-voltage | 85B24LS · 12 V · 45 Ah | AtlasBX / Hankook reference ONLY where the car has the original compatible lead-acid system | View original source ↗ |
| Gigafactory Shanghai build transition (approximate) | October 2021 | Tesla's approximate transition to lithium-ion low-voltage batteries; confirm physical equipment | View original source ↗ |
| Fremont build transition (approximate) | December 2021 | Tesla's approximate lead-acid to lithium-ion transition; not a VIN decoding rule | View original source ↗ |
Match the exact vehicle.
Check 1
Check the actual car's production factory, date and fitted low-voltage technology; Tesla explicitly says the dates are approximate and users must confirm hardware.
Check 2
Do not install an older 12V lead-acid replacement into a Model 3 equipped with a lithium low-voltage system. Consult Tesla service for compatible parts.
Check 3
High-voltage traction battery work is not covered here. Do not use this reference as a do-it-yourself electrical disconnection or replacement procedure.
Where the numbers came from
Tesla's archived North American 2017–2023 Model 3 owner's-manual page 'Replacing the Low Voltage Lead-Acid Battery' names AtlasBX/Hankook 85B24LS 12V 45Ah and distinguishes approximate factory-specific lithium changeovers.
Primary evidence (1 source)
- Manufacturer source 1tesla.com ↗
3 exact configuration rows supported
This page is an original explanation of limited factual specifications. CarFactBook has not inferred an exact VIN, fitted replacement part, global-equivalent manual or unpublished service quantity.
Source count: 1. The original manufacturer's vehicle-specific manual and labels take priority if your exact car differs from these listed reference configurations.
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