My battery died last night and after waiting for 3 hours and dealing with 3 different battery technicians to arrive before they finally had the right size battery - I was told that the one they were putting in wasn’t an exact match, but “would work”. Needless to say this didn’t leave me feeling very confident.
I knew that the group size for my vehicle was 75 because I have purchased several new batteries all of which were “75-N”. The one that was installed last night was “75-C”. I figured a quick 1 minute internet search this morning would explain the difference and the meaning of the letters following different group sizes, but I after spending the last hour searching everything I could find - including many auto battery information and retail websites - I still haven’t found any explanation. I understand the group size number is primarily about the size and physical dimensions of the battery but nowhere is the extra LETTER explained.
Could you please tell me what the letters - (“N” and “C” in particular) - mean when following a battery such as my 75 group?