2022 Tesla Model Y Battery Size & Specs

Quick answer: 12V Lithium-Ion

Unlike traditional gasoline or diesel vehicles, the 2022 Tesla Model Y does not use a conventional 12-volt lead-acid battery for its low-voltage systems. Instead, it is equipped with a modern 12-volt lithium-ion battery. This is a significant departure from the older Tesla models (pre-2021) which used an AGM lead-acid battery.

• Battery Type: Factory-equipped with a 12V lithium-ion battery.
• BCI Group Size: Not applicable. This is a proprietary Tesla part that does not conform to standard BCI group sizes (like H6, Group 65, etc.).
• Cold Cranking Amps (CCA): Not applicable. CCA is a rating for lead-acid batteries' ability to start a cold internal combustion engine. Since the 12V battery in a Tesla does not start an engine, this metric is irrelevant.
• Replacement: The battery must be replaced with the official Tesla part.

Replacement Battery Options

Currently, the only replacement option for the 2022 Model Y's 12-volt lithium-ion battery is the OEM part directly from Tesla. Due to its proprietary design, voltage, and integration with the vehicle's management system, there are no aftermarket BCI-sized batteries (from brands like Interstate, Optima, or DieHard) that will work.

• OEM Part: Tesla Part #1773612-00-A (or latest revision)

AGM vs. Flooded — Which Does This Vehicle Need?

Neither. The 2022 Tesla Model Y requires a specific lithium-ion 12V battery. Do not attempt to install a lead-acid battery, whether it's AGM or flooded. The vehicle's charging system and battery management software are designed exclusively for the lithium-ion chemistry. Using the wrong type of battery will lead to system malfunctions, warning messages, and potential damage to the vehicle's sensitive electronics.

Post-Installation Relearn / Reset Procedure

Replacing the 12V battery in a Model Y is a more involved process than in a traditional car and should ideally be performed by Tesla Service or a qualified technician familiar with the procedure. After the physical replacement, the vehicle needs to recognize the new battery.

1. Enter Service Mode: This is done through the main touchscreen display.
2. Run Battery Replacement Routine: Within Service Mode, there is a specific software routine for 12V battery replacement. This procedure safely disconnects high and low voltage systems, and upon completion, reinitializes the vehicle's systems and calibrates them to the new battery.
3. Confirm Alerts are Cleared: Once the routine is complete and the vehicle is restarted, ensure no battery-related warnings are present on the display.

Failure to perform the software-side reset can result in the vehicle not charging the new 12V battery correctly, leading to its premature failure and leaving you stranded.

Signs of a Failing 12V Battery

The Model Y's onboard diagnostics are very effective at monitoring the health of the 12V battery. The most common sign of failure is a specific alert on the touchscreen.

• "12V battery must be replaced soon" Alert: This is the most direct indication. The car gives you a warning, often with enough time to schedule a service appointment.
• Unusual Electronic Glitches: In rare cases, you might notice sporadic issues with windows, infotainment, or other electronics if the battery is failing unexpectedly.
• Failure to "Wake Up": If the 12V battery is completely dead, the car will not be able to power up, close the main high-voltage contactors, or even unlock its doors. This is an emergency situation requiring manual power application to the frunk release terminals.

Common Battery Issues for This Generation

As one of the first models to feature the new lithium-ion 12V architecture, the primary issue is simply the eventual end-of-life for the battery. Unlike lead-acid batteries that might last 3-5 years, the service life of the 12V li-ion battery is projected to be longer, potentially 4-8 years, though real-world data is still being gathered. There are no widespread, common "issues" with the battery itself, as its health is actively managed by the vehicle's software.

Find a trusted shop on Repairius.