Custom Fitment for OPTIMA Batteries

Tips & Support
OPTIMA Batteries
Milwaukee, WI

Did you know there are dozens of different BCI battery group sizes, plus a whole assortment of DIN (Europe) and JIS (Asia) battery sizes? While OPTIMA doesn't offer what we consider to be "direct-fit" replacements for every vehicle, many owners have successfully used our products in applications that we would consider to be "custom fitments," by considering the following guidelines:

  • Hood Clearance – There should be at least ¾” clearance between the top of the battery terminals and the underside of the hood. When we do our fitment studies we put a ball of clay on top of the post, and VERY carefully close the hood to make sure that nothing makes contact. By measuring how much the clay is squeezed down when the hood is closed, we can know how much hood clearance we have.
  • Trunk/Interior Mounting – If your battery is mounted inside the passenger compartment or trunk the battery must be vented to the outside of the vehicle. OPTIMA group 27, DS46B24R, 51, 78, 34C, 31, H5, H6 and H7 batteries all have ports for connecting a vent hose.
  • Side Terminals – OPTIMA 34/78, D34/78, 75/25 and D75/25 batteries have both top and side terminals. If you are using one of these batteries in a vehicle that uses the top terminals, it is important to ensure that the side terminals can not come into contact with anything metallic (for example, the firewall or fender well), thereby causing a short.We suggest keeping the post protectors on the terminals you are not using.
  • Battery Modifications – Cutting, drilling, trimming or otherwise modifying your OPTIMA battery may present a safety hazard and will void the warranty.
  • Mounting – Your OPTIMA battery must be securely mounted. The terminals are not intended to be used to secure the battery. Using the terminals in this way will damage the battery and void your warranty.
  • Heat – Protect your battery from high heat, such as turbochargers or exhaust manifolds

If you are ready to shop, please head over to the OPTIMA online store.