Choosing a Replacement Battery

Eventually, every car needs a new battery. Unfortunately, there is no one-size-fits-all part suitable for every vehicle. Battery freshness, type, physical size, terminal locations, cold cranking power, reserve capacity and warranty are all important considerations.

Most cars use conventional flooded lead-acid batteries, but increasing numbers of newer models with high electrical loads require an enhanced flooded battery or absorbent glass mat design. Installing the wrong type battery can adversely affect electrical system performance and battery life.

Replacement batteries are primarily selected based on their Battery Council International (BCI) Group Number and Cold Cranking Amps (CCA) rating. The Group Number (for example, Group 24) is an industry standard that defines the battery's physical size, its hold-down configuration, and the type and location of its terminals. Cold Cranking Amps (for example 650 CCA) is an electrical measure of how much current the battery can provide for 30 seconds at 0°F without its voltage falling below specified levels.

Select a battery with the same Group Number as the original equipment (OE) battery. This will ensure a secure fit, proper clearance, and no cable/terminal issues. Here are some additional tips:

• If your vehicle uses a non-standard battery (one without a Group Number), use an OE replacement or take special care to ensure a non-OE battery will not create problems.
• If your car's OE battery is equipped with a protective heat shield, make sure the shield will fit properly over the replacement battery.
• Never install a battery with a CCA rating lower than that recommended by the automaker. A higher CCA-rated battery will provide additional starting power in cold climates, but provides no added benefit and may shorten battery life in hot climates.
• Purchase your battery from a high-volume seller with fresh stock no more than 150 days old. Most batteries have a three- to five-year life from their date of activation.
• Look for a battery with an extended warranty. AAA premium batteries have a 72-month limited warranty with free replacement for the first 36 months.

For maximum convenience, AAA Mobile Battery Service (available in most areas) has trained technicians who can come to you and perform a free test of your car’s battery, starting and charging systems. If necessary, with your approval, they can install a high-quality AAA battery right on the spot.

Visit AAA.com/Battery to get an instant quote or to request AAA Mobile Battery Service.