Failing that, you can:
* Look at your current battery: The group size is usually printed directly on the battery's top or side.
* Check the battery tray: Sometimes the recommended group size is stamped or stickered on the battery tray itself.
* Use an online parts lookup: Websites like AutoZone, Advance Auto Parts, or Napa Auto Parts allow you to enter your vehicle's year, make, and model to find the correct battery.
Once you know the group size, you can then choose a battery with the appropriate CCA (Cold Cranking Amps) rating. Higher CCA is better for cold weather starts. You can also consider AGM (Absorbent Glass Mat) batteries, which are more expensive but offer longer life and better performance in extreme temperatures. However, a standard flooded lead-acid battery is perfectly suitable for most users.
