Vehicles with automatic start-stop typically need a battery built for frequent engine restarts and deeper cycling.

• Choose a start-stop–rated AGM: Look for AGM (Absorbent Glass Mat) batteries labeled for start-stop systems in your exact group size.
• Match fitment: Confirm the BCI group (e.g., 35, 47/H5, 94R/H7, 49/H8, 51R), dimensions, and terminal orientation.
• Check specs: Meet or exceed the vehicle’s Cold Cranking Amps (CCA) and Reserve Capacity (RC) requirements.
• Auxiliary support: Some models also use a small auxiliary 12V battery (e.g., AUX sizes) to support electronics.

When in doubt, verify in your owner’s manual or use an online fitment tool to confirm compatibility.

A start-stop battery is a 12V automotive battery designed to support vehicles that shut off at stops and restart automatically.

• Built for frequent restarts: It’s engineered to handle repeated engine cranking through the day.
• Deep-cycle capable: Often AGM construction to manage accessory loads while the engine is off.
• Faster charge acceptance: Designed to recover quickly between starts.
• Auxiliary options: Some vehicles pair a main battery with a smaller auxiliary battery for added electrical stability.

These batteries differ from standard starting batteries and are labeled for start-stop use. Always match the correct group size and specifications for your vehicle.

Lifespan can vary widely because start-stop duty is demanding. Several factors influence how long a battery may serve:

• Driving patterns: Frequent short trips and heavy accessory use can increase cycling.
• Climate: Extreme heat or cold can impact performance over time.
• Vehicle charging health: A well-functioning charging system supports battery longevity.
• Battery type and sizing: Using a start-stop–rated AGM in the correct group size helps.
• Care: Keeping terminals clean and securing the battery properly can reduce strain.

Periodic battery testing and timely replacement can help prevent unexpected no-starts. Results vary by vehicle, usage, and conditions.

Costs vary based on the battery and the vehicle. Key factors include:

• Battery type: Start-stop–rated AGM or lithium options can differ in price.
• Group size and specs: Larger sizes or higher CCA/RC typically cost more.
• Auxiliary batteries: Vehicles with an additional 12V battery may require replacing both.
• Installation complexity: Tight mounting locations or electronic resets can add labor time.
• Recycling/core charges: Fees may apply, often refundable when you return the old battery.

You can check fitment and availability online, then compare pickup, delivery, or in-store installation options in your area.

Group size ensures the battery fits and connects correctly. Here’s how to pick it:

• Confirm your spec: Check the owner’s manual or the label on your current battery for the BCI group (e.g., 35, 47/H5, 94R/H7, 49/H8, 51R).
• Match dimensions and terminals: Ensure length, width, height, and terminal orientation match your tray and cables.
• Select start-stop–rated: For vehicles with auto start-stop, choose an AGM battery labeled for that use.
• Check CCA and RC: Meet or exceed the vehicle’s requirements for reliable starts and accessory support.

When unsure, use an online fitment tool to verify exact compatibility for your vehicle.