In Reply to: Re: Ford 8N tractor starter won't disengage, Positive Drive type posted by Tim Daley(MI) on March 10, 2020 at 14:32:06:
Wow, that is a lot of information! Will take me a while to digest it all. :-)
The battery maintainer pictured in my previous post is indeed a float charger (with automatic cut-off), here is a link to technical data, if desired: https://manuals.harborfreight.com/manuals/69000-69999/69955.pdf
I've experience with these (there's one permanently mounted to my work truck), I've never had any issues with my float chargers for years, and at less than 10 bucks, it's hard to go wrong (if does eventually go out, they're cheap to replace).
Using tried-and-true battery Rejuvenation measures (see my previous post), I've managed to avoid having to replace batteries, such that I've been able to make some of the mid-grade batteries last as long as top brands.
When AGM battery went out on my MX-5 Miata, I did a bit of research, finding Walmart EverStart brand was a top contender in independent battery tests, without paying top dollar for the best brands. Thus far, battery's working out well and I'm pleased for money spent.