The Altima uses a standard 12-volt automotive battery; the exact group size depends on the model year and engine, with common options including 24F, 35, and 46R. Always verify the correct size by checking your owner's manual or the battery label.
The Nissan Altima’s electrical system runs on a conventional 12-volt lead-acid battery that powers starting and accessories. Replacement batteries must match the vehicle’s specifications in fit, CCA (cold-cranking amps), and RC (reserve capacity). If you’re unsure, consult the Nissan parts catalog or a trusted retailer, and consider having the installation done by a professional to ensure proper fit and safety.
Battery type and size basics
Understanding the basics helps you identify the right unit and avoid buying the wrong part. Here is what you need to know about the Altima’s starting battery and how it’s sized.
What is a group size?
Group size refers to the battery’s dimensions, terminal layout, and weight. It ensures the battery fits the tray and aligns with the cables and connectors in your car.
Common group sizes used in Altima models
Across different Altima generations, several group sizes have appeared. The following are the sizes most often associated with recent Altima models; the exact size for your car should be confirmed from the manual or the existing battery label.
- Group 35 — widely used in many 2007–2018 Altima variants with 2.5L or 3.5L engines.
- Group 24F — found in some earlier Altima editions or where a higher cold-cranking capacity is specified.
- Group 46R — used in certain configurations or regional variants; note the terminal orientation when shopping.
- Group 34/34R — appears in select markets or trims with compatible tray and wiring.
Finding the exact group size for your car is essential because even a small mismatch can affect fit and performance.
How to determine the correct battery for your Altima
Use these steps to verify you buy the right battery for your specific car.
- Check the owner’s manual for the recommended battery group size and CCA/RC ratings.
- Look at the current battery’s label for its group size, CCA, RC, and terminal type.
- If the label is unreadable, measure the battery dimensions and compare them to the manufacturer’s group-size specifications, or consult a dealer/parts retailer with your VIN.
- Choose a replacement that matches or exceeds the OEM CCA and RC, and ensure the physical fit and terminal orientation match your car’s wiring.
Note: Some Altima hybrids or newer trims may have slightly different specs; always confirm with an up-to-date parts catalog or dealership if in doubt.
Buying and installation considerations
Before you buy, consider fit, warranty, and installation options. Here are practical steps to take.
- Decide between a standard flooded lead-acid battery and an AGM (absorbed glass mat) type; AGM can offer longer life and better performance in heat but costs more.
- Check warranty length and coverage; many OEM-replacement options come with 2–3 year warranties, while premium AGM options may offer longer coverage.
- Ensure the battery fits the tray, has the correct terminal layout, and that the hold-down mechanism will work; verify that venting and size are appropriate for the engine bay.
- Consider professional installation or free battery testing/replacement services often provided by auto parts stores.
After installation, have the charging system tested to confirm the alternator properly recharges the new battery, and dispose of the old battery at a proper recycling facility.
Special case: Nissan Altima Hybrid or high-voltage considerations
Hybrid versions of the Altima still rely on a 12-volt battery for accessories, while the high-voltage traction battery handles propulsion. If your Altima is a hybrid, treat the 12-volt replacement as described here, and consult the dealership for any high-voltage system service if you suspect traction-battery issues.
Summary
The Nissan Altima runs on a 12-volt automotive battery, with the correct group size varying by year, engine, and trim. Common group sizes include 24F, 35, 46R, and 34/34R, but always verify the exact spec from the owner's manual or the existing battery label. When shopping, match or exceed the OEM CCA and RC, ensure a proper physical fit, and consider installation options. If you own a Hybrid Altima, remember there is also a separate high-voltage pack for propulsion, with the 12-volt battery serving only auxiliary systems.