---
title: "Tesla Model Y Battery Size and CCA"
description: "How the Tesla Model Y battery specification changed from 2020 to 2025, compared generation by generation. The Tesla Model Y uses a BCI group Tesla proprietary ~15.5-16V lithium-ion low-voltage battery battery. Fitment, replacement notes, and what to check before you buy."
url: "https://whichcarparts.com/cars/tesla/model-y/battery"
updated: "2026-08-20"
---

# Tesla Model Y Battery Size (BCI Group and CCA)

The specification is not the same across every year we cover, the table below shows exactly where it changes.

## Has the Tesla Model Y battery specification changed by year?

| Model years | Group size | CCA | Type | Location |
| --- | --- | --- | --- | --- |
| [2025](https://whichcarparts.com/cars/tesla/model-y/2025/battery) | Group Tesla proprietary ~15.5-16V lithium-ion low-voltage battery | N/A | N/A | Low-voltage battery under front trunk area / behind front apron (Tesla service access) |
| [2020-2024](https://whichcarparts.com/cars/tesla/model-y/2020-2024/battery) | Group 85B24LS (JIS) 12V lead-acid, early builds only; see notes | N/A | N/A | Front trunk area, under the plastic underhood apron |

## Full specifications by generation

The battery on a Tesla Model Y is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers.

- [2025 Tesla Model Y Battery](https://whichcarparts.com/cars/tesla/model-y/2025/battery)
- [2020-2024 Tesla Model Y Battery](https://whichcarparts.com/cars/tesla/model-y/2020-2024/battery)

## Tesla Model Y battery: common questions

### What size battery does a Tesla Model Y take?

BCI group Tesla proprietary ~15.5-16V lithium-ion low-voltage battery. Group size is a physical dimension and terminal-position standard, so a battery from a different group may not clamp down or may put the terminals on the wrong side.

### Where is the battery on a Tesla Model Y?

Low-voltage battery under front trunk area / behind front apron (Tesla service access).

### Does a Tesla Model Y need the battery registered after replacement?

This is the low-voltage accessory battery, not the drive pack. 2025 Juniper builds continue the Tesla-proprietary lithium-ion low-voltage battery (later 2026-model-year builds reportedly moved to a 12.8V LFP unit). It is designed to last the life of the car, is monitored by the vehicle, and is not a DIY or parts-store replacement, Tesla service handles it. No lead-acid option exists on this generation.

## Sources

- [Tesla Model Y Owner's Manual (2025+), Wheels and Tires](https://www.tesla.com/ownersmanual/modely/en_us/GUID-FDDB10EF-FFA9-46EB-B8CC-03614AE92B6B.html)
- [Tesla DIY, Replacing Cabin Air Filters (Feb-2025 production changes)](https://service.tesla.com/docs/Public/diy/modely/en_us/GUID-1C689042-6645-4617-B270-7F2DA9A5624E.html)
- [Tesla Support, Vehicle Maintenance (official intervals)](https://www.tesla.com/support/car-maintenance)
- [Car and Driver, 2025 Model Y (Juniper) US details, 327-mi EPA range](https://www.caranddriver.com/news/a63541277/2025-tesla-model-y-us-details-price/)
- [T Sportline, Model Y Juniper wheel & tire guide (Crossflow/Helix/Arachnid OE fitments)](https://tsportline.com/blogs/tesla-aftermarket-support/the-tesla-model-y-juniper-wheel-guide)
- [NHTSA recall lookup, 2025 Tesla Model Y (25V-002, 26V-315)](https://www.nhtsa.gov/recalls)
- [Kelley Blue Book, 2025 Model Y ranges](https://www.kbb.com/tesla/model-y/2025/)
- [Wikipedia, Tesla Model Y (Juniper timeline, Performance/Standard 2026 launch)](https://en.wikipedia.org/wiki/Tesla_Model_Y)

## Find your exact Model Y

- [2025](https://whichcarparts.com/cars/tesla/model-y/2025)
- [2024](https://whichcarparts.com/cars/tesla/model-y/2024)
- [2023](https://whichcarparts.com/cars/tesla/model-y/2023)
- [2022](https://whichcarparts.com/cars/tesla/model-y/2022)
- [2021](https://whichcarparts.com/cars/tesla/model-y/2021)
- [2020](https://whichcarparts.com/cars/tesla/model-y/2020)

More Tesla Model Y guides:

- [Oil & filter](https://whichcarparts.com/cars/tesla/model-y/oil)
- [Tires & wheels](https://whichcarparts.com/cars/tesla/model-y/tires)
- [Wiper blades](https://whichcarparts.com/cars/tesla/model-y/wipers)
- [Air & cabin filters](https://whichcarparts.com/cars/tesla/model-y/filters)
- [Bulbs](https://whichcarparts.com/cars/tesla/model-y/bulbs)
- [Brakes](https://whichcarparts.com/cars/tesla/model-y/brakes)
- [Fluids](https://whichcarparts.com/cars/tesla/model-y/fluids)
- [Service schedule](https://whichcarparts.com/cars/tesla/model-y/service-schedule)
- [Problems & reliability](https://whichcarparts.com/cars/tesla/model-y/common-problems)
- [Key fob battery](https://whichcarparts.com/cars/tesla/model-y/key-fob-battery)
- [Specs](https://whichcarparts.com/cars/tesla/model-y/specs)

Specifications vary with engine option, production date, and market.