What key fob battery does your car take?
Pick your car and get the exact coin-cell battery for its key fob — CR2032, CR1620, CR2450 and the rest. We cross-check every code against two independent sources, and when a car takes a different cell in the smart key than the basic remote, we split them out. Popping your fob open to read the old cell is always the final confirmation.
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Pick your model year to start.
Popular cars
Jump straight to a confirmed coin-cell code.
Browse all 21 cars A-Z
Acura: MDX (2022-2026), TLX (2021-2025), TSX (2004-2014)
Audi: A4 (2017-2025)
Cadillac: CT4 (2020-2026), CT5 (2020-2026)
Chevrolet: Blazer (2019-2026), Camaro (2016-2024), Equinox (2018-2024), Silverado 1500 (2014-2018)
GMC: Sierra 1500 (2014-2018), Sierra 1500 (2019-2026)
Honda: Accord (2018-2022), Civic (2016-2021), Civic (2022-2026), CR-V (2023-2026)
Hyundai: Elantra (2021-2026)
Nissan: Altima (2019-2026)
Toyota: Camry (2018-2024), RAV4 (2019-2025), Tacoma (2005-2015)
Key fob battery questions
- How do I find the right key fob battery for my car?
- Pick your year, make, and model above. For cars we've confirmed, you get the exact coin-cell code — cross-checked against two independent sources. Many cars take a different cell in the smart key than in the basic remote, so we list each fob style separately. The surest check is to pop your fob open and read the marking on the old battery.
- What is the most common key fob battery?
- The CR2032 is the most common — a 20 mm, 3-volt lithium coin cell used in a huge share of modern smart keys. But it is far from universal: plenty of fobs take a CR1620, CR2025, CR1632, or a thicker CR2450, and some take two cells. Don't assume CR2032; confirm it for your exact car and fob style.
- Does it matter which brand of coin cell I buy?
- No. A coin cell is identified by its number (the 2032 in CR2032), not the brand — a CR2032, ECR2032, and DL2032 are the same cell from different makers. Buy a fresh, in-date lithium cell of the right number from any reputable brand. Avoid no-name bulk packs that can sit on a shelf past their prime.
- How do I know if my fob takes one battery or two?
- Most fobs take one coin cell, but some take two stacked cells. The only sure way is to open the fob and look. Where a car is known to use two, we note it next to the code. When you replace them, swap both at once so they discharge evenly.