Larger trucks or performance cars could use a larger group 65 or 78 battery, but be sure to check your battery's label before you go shopping for a new one.

We've tested and reviewed products since 1936. Read CR's review of the Interstate MT7-65 car battery to find out if it's worth it.

Below, we present the best car batteries for the money in seven different sizes: Group 24/24F, Group 35, Group 47 (H5), Group 48 (H6), Group 49 (H8), Group 51R, and Group 65.These numbers indicate ...

The battery group then corresponds to the size of the battery being tested, ... The largest batteries Consumer Reports tested are in the Size 65 category, for large Ford and Mercury cars, ...