If you're swapping a battery between a Ford Forester and a Toyota RAV4 or considering one as a replacement for the other you’re likely wondering: do they use the same battery size? The short answer is no. While both vehicles commonly use Group 35 batteries, the fit isn’t guaranteed across all model years or trims. That’s why a direct Ford Forester to Toyota RAV4 battery size comparison matters: it helps avoid buying the wrong battery, damaging terminals, or dealing with poor cranking performance.

What does “Ford Forester to Toyota RAV4 battery size comparison” actually mean?

This phrase refers to checking whether the physical dimensions (length, width, height), terminal placement, and cold cranking amps (CCA) of a battery designed for one vehicle are compatible with the other. It’s not about brand compatibility it’s about mechanical fit and electrical output. For example, a 2018–2023 Subaru Forester typically uses a Group 35 battery with top-post terminals and ~500 CCA. A 2019–2022 Toyota RAV4 also often uses Group 35 but some hybrid models use smaller 12V auxiliary batteries, and certain AWD trims may require higher CCA. So even if the group number matches, small differences in height or post offset can cause fit issues.

When would someone actually need this comparison?

You’d need it in three common situations: replacing a dead battery with what you already have on hand, shopping for a cost-effective aftermarket option, or using a universal or multi-fit battery. Say your Forester’s battery died while you’re traveling and the only spare you’ve got is from an older RAV4. Before installing it, you’d check whether the terminals line up and whether the hold-down clamp fits. Or maybe you’re comparing prices between a Forester-specific battery and a RAV4-compatible one at a local parts store. In those cases, knowing the exact specs not just the group number keeps things safe and functional.

What battery sizes do most Foresters and RAV4s actually use?

Most non-hybrid 2008–2023 Subaru Foresters use Group 35 batteries typically 9.06" L × 6.94" W × 7.50" H, with top posts. Some earlier models (like the 2005 Forester) used Group 35 but also had Group 25 and Group 26 alternatives depending on trim and climate options details covered in our guide for the 2005 model.

Most non-hybrid 2013–2023 Toyota RAV4s also use Group 35, but with tighter height tolerances (some are rated at 7.38" max). A few 2016–2019 AWD models specify Group 35 with higher CCA (650+), which may not be necessary or even recommended for a standard Forester. You’ll find full size and spec breakdowns including CCA, reserve capacity, and terminal type in our Forester battery equivalent size chart.

What’s the biggest mistake people make in this comparison?

Assuming “Group 35 = plug-and-play.” Group numbers tell you the general footprint, but not how far the positive terminal sticks out, whether the case has a recessed handle, or whether the battery sits flush under the hood brace. One real-world example: a Group 35 battery meant for a RAV4 might sit ¼" too high in a Forester’s tray, preventing the hood from closing fully. Another issue is CCA mismatch installing a 450-CCA RAV4 battery in a cold-climate Forester could lead to slow starts below 20°F. Always cross-check the OEM part number or consult a trusted cross-reference like our Interstate battery guide for older Subarus.

How to check compatibility yourself (in under 2 minutes)

You don’t need special tools just your current battery label and 30 seconds online:

  • Flip your old battery over and note the group size (e.g., “35,” “24F,” or “46B24R”) and CCA rating
  • Look up your exact model year, trim, and engine type on a site like Batteries Plus
  • Compare length/width/height and terminal type not just the group number
  • If ordering online, double-check photos of the battery in a Forester or RAV4 engine bay (not just a stock product shot)

Next step: Verify before you buy

Pull your current battery and measure it with a tape measure. Then compare those numbers side-by-side with the specs listed for your target replacement whether it’s labeled “for Toyota RAV4” or “for Subaru Forester.” If the height differs by more than 1/8", or the positive terminal is more than 1/4" farther forward, skip it. Better to wait two days for the right fit than risk corrosion, poor grounding, or a stranded car. And if you’re working with an older Forester, especially pre-2010, check whether your model originally came with Group 25 or Group 35 since mixing them can affect alternator load and dashboard warnings.