Alternator took a dump last night

[beat taco]

I had to replace the 6v batteries in my dads RV this year (which I purchased after his passing). The battery guy asked if they were from '11 or '01 from looking at the year stamp, they were obviously the originals from '01. My dad never maintained them, they would go winters hooked up without a charger or any use, often 6 months, and lasted 12 years!