We've all been there: you try to start your car, and when you turn the key nothing happens. Maybe you left your lights on or ran the battery too long without starting the engine. One thing is guaranteed, though: without a properly working battery, you're not going anywhere.

It's not just the occasional energy deficit you have to worry about, either. Over time, batteries die. It's a simple fact that's simple enough to fix, but there are many different kinds of batteries. In fact, each car has one group size, and one group size alone, that works for it. You need to find the right size, or you open yourself up to a world of annoyance, aggravation, and possibly serious internal damage.

So then, how do you determine car battery group size? What size car battery do I need?

How to Determine Car Battery Group Size

  • Optima Red Top BatteryThe first place you can look to find the proper battery group size for your vehicle is the Owner's Manual. If the company did it right, the manufacturer specs should be easy to locate. Yours will feature either numbers or a combination of letters and numbers.
  • Look directly on the battery you're replacing. Particularly if it's original equipment, you can usually find the group size printed on the top or side labeling. You'll also find other information here, like cold-cranking amps and reserve charge, that can be helpful as you shop for your replacement.
  • The next simplest way is to ask an expert. Whether that means visiting an auto parts professional at the local shop or heading to the service department at a nearby dealership, you should have the information you need in no time. After all, it's these people's jobs to provide the information you need to keep your car or truck in the best condition possible.

Car Battery Group Sizes

Here's a handy listing of sizes to expect for certain vehicles:

Size 34 - Chrysler

Size 35 - Honda, Nissan, Toyota

Size 65 - Ford, Lincoln, Mercury

Size 75 - General Motors cars

Size 34/78 - certain Chrysler and GM models that need two terminals

This, however, is just a basic list, intended only to help you more easily find battery group size information. We highly recommend you use one of the above methods to accurately determine the car battery group size for your vehicle.

Shop with AAG!

Once you know what the group size is, come shop at AAG! We've got a nice selection of performance Car Batteries and battery chargers designed to fit a wide variety of new and vintage automobiles. The CTEK Battery Charger is an incredible product that constantly monitors and maintains your battery's performance, maximizing your battery's life and helping you get the most for your money. Or if you have a portable car booster like the Heat and Clean Car Booster Battery Charger, you won't need to ever ask a stranger for a jump. Once you've discovered the proper car battery group size for your vehicle, check out our stock and see what's what. You just might find the perfect one for your ride, and once you do we'll ship it your way for FREE! Happy shopping!