Finding The Correct Battery

How do you know which battery is right for your vehicle? Here are some of the key factors you should consider.
Physical Battery Size:
To order the correct battery, it is important to ensure you have the right Battery Group Size. 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. For example this battery label indicates:
BCI Group 31
1125 Cranking Amps
925 Cold Cranking Amps
190 Minutes Reserve Capacity
Below are the dimensions for the most common batteries that we carry:
BCI Group Number Length (inches) Width (inches) Height (inches)
Passenger Car and Light Commercial Batteries (12 Volt/6 Cells)
24 10 1/4 6 13/16 8 7/8
26 8 13/16 6 13/16 8
Heavy-Duty Commercial Batteries (12 Volt/6 Cells)
4D 20 3/4 8 3/4 9 7/8
8D 20 3/4 11 1/8 9 7/8
31 13 6 13/16 9 7/16
Click here for a full list of BCI specifications
Cold Cranking Amps (CCA):
CCA is the number of amps a 12-volt battery can deliver at 0°F for 30 seconds while maintaining a voltage of at least 7.2 volts.
Cranking Amps (CA):
CA is the number of amps a 12-volt battery can deliver at 32°F for 30 seconds while maintaining a voltage of at least 1.2 volts per cell (7.2 volts for a 12-volt battery).
Battery Reserve Capacity (RC):
RC is a general indicator of how long a new, fully charged battery can continue to operate essential accessories if the vehicle's alternator fails. It identifies how many minutes the battery can deliver a constant current of 25 amps at 80°F without falling below the minimum voltage, 1.75 volts per cell (10.5 volts for a six cell twelve volt battery), needed to keep your vehicle running.