It showed group 36R as the correct one. He did not have it in stock, so he substituted a group 24F. He said the main difference was that the “cold-cranking power” was higher in the 24F.

BCI guidelines establish group sizes for batteries with codes like 24F, 35, and 48H6. If you try to use a battery that doesn't match your vehicle, you may not be able to fit it properly or connect ...

We've tested and reviewed products since 1936. Read CR's review of the DieHard Gold 24F-6 car battery to find out if it's worth it.

Read CR's review of the Weize Platinum 24F AGM car battery to find out if it's worth it. Ad-free. ... This test measures voltage after 15 and 30 seconds of cranking at 0ºF, ... Cold Weather ...