Car and Truck Battery

The best way to ensure you get the right battery is to consult your vehicle's owner's manual. You can also use in-store or online battery finders, which allow you to input your car's year, make, and model to find compatible options. Key factors to match are the battery's group size (physical dimensions), Cold Cranking Amps (CCA), and terminal location.

These are standard performance ratings:

• CCA (Cold Cranking Amps): This is the most important rating, especially in colder climates. It measures the battery's ability to start an engine at 0°F (−18°C). A higher CCA is better for cold weather.
• CA (Cranking Amps): Measured at a warmer 32°F (0°C), this number will always be higher than the CCA. It's less critical than CCA but still indicates starting power.
• RC (Reserve Capacity): This measures how many minutes the battery can run essential accessories (like headlights) with the engine off before it's fully discharged. A higher RC is beneficial if you frequently use electronics while parked.

The key difference lies in their internal design and the level of electrical demand they are built to handle.

• Flooded (or Wet Cell) batteries are the traditional, most common type. They use a liquid electrolyte solution and are generally the most affordable option.
• AGM (Absorbent Glass Mat) batteries are more advanced. The electrolyte is absorbed in fiberglass mats, making them spill-proof and more resistant to vibration. They are better at handling the high electrical demands of modern vehicles with features like start-stop technology, and they typically last longer. If your vehicle came with an AGM battery, you must replace it with another AGM.

Look for a date code sticker, usually on the top or side of the battery. The code typically starts with a letter and a number. The letter corresponds to the month (A=January, B=February, etc.), and the number represents the year (e.g., '5' for 2025). A battery that is more than six months old has been sitting on the shelf for a while, so aim for the newest one possible.

It's the most likely culprit. If you hear a rapid clicking sound or no sound at all when you turn the key, the battery is likely dead. If the engine cranks but won't start, the problem might be your alternator, starter, or fuel system. A simple voltage test can help diagnose the issue; a healthy, fully charged car battery should read around 12.6 volts or higher when the car is off.

Always consult your owner's manual first! The general procedure is:

1. Connect the red (positive) clamp to the positive (+) terminal of the dead battery.
2. Connect the other red (positive) clamp to the positive (+) terminal of the good battery.
3. Connect the black (negative) clamp to the negative (-) terminal of the good battery.
4. Connect the final black (negative) clamp to an unpainted metal surface on the dead car's frame, away from the battery. This is the ground connection.
5. Start the working car, let it run for a few minutes, then try to start the dead car.

A parasitic drain is an electrical load that draws power from the battery even when the vehicle is turned off. All modern cars have a small, normal drain to power things like the clock and security alarm. However, a faulty component (like a glove box light that stays on or a bad radio) can cause an excessive drain that will kill your battery overnight.

Car batteries are hazardous waste and must be recycled. Do not throw them in the trash. Nearly any retailer that sells car batteries (including auto parts stores and service centers) is required by law to accept old batteries for recycling, often providing a credit (core charge) toward the purchase of a new one.