I have an 821 with a diesel and a cracked battery. I took the monster in to the New Holland dealership to get the replacement for it and they looked at me like I had 3 heads especially when they went to look up the battery and -insisted- that the 801 series didn't come with 12v charge systems according to their computer program. Anyway, New Holland is looking at an excessively long time to get me an appropriate battery but I'd sure like to get the tractor running before Christmas. What are my options as far as replacement batteries of the correct size and cranking amperage goes? I haven't really called around because I don't have a model number for the battery and I'm sure I'll be faced with the same half hour argument that the battery I have did indeed come out of the tractor I say it did, so if I could even have that I'd appreciate it!