Jon, A year ago, my GMC was 5 years old. The dealer told me my battery had a full charge but failed the load test. That's when I bought the batteryminder. It can charge gel, flooded and AGM batteries at 2,4 & 8 amp rate. My truck had the original Delco Agm. I bought a new battery for the truck and put the batteryminder on the old battery for 3 months. No change in battery's condition.
On other batteries, it may take weeks or a few days to run through the complete cycle, but when it's done, the charger goes in to a default, gel and 2 amp light flash.
I do have a mower battery made on 2008. It's rated at 340 cca. My battery conductive tester shows it's bad. Battery makes 240 cca. My batteryminder has spend a lot of time on this battery the past winter with no noticeable change in the cca.
However, you can buy a new cheapie mower battery rated at 200 cca. So I've learned to buy the bigger battery and even though it's shows bad, it can still out preform a new battery. I will install the 2008 battery in a mower that is close to home, so I can keep an eye on it.
My farmall, IH C, has a very old 12v battery, can't say just how old, but old. It has one cell that is weak, battery conductive testor shows battery is bad. However when you hit a 6v starter with a sick 12v battery, the starter flips the engine over like it's a healthy battery. Had I not used a hydrometer or the battery conductive testor, I would think the batteryminder was doing GREAT. I just moved the batteryminder to the IH C this morning.
The way I feel about the batteryminder it won't reverse the aging process of a battery, but hopefully it will slow down the aging process.
I have a very old 12v battery on the Jubilee too. Same as the IH C. An old wimpy 12v can move a 6v starter faster than a good 6v battery.
You slow down the aging process of a battery by keeping it fully charged even if you use a trickle charger. Just don't over charge it or you will damage it.
Just my $.02 worth.
I won't spend $100 on another batteryminder.
I like my battery conductive tester. It lets you know your battery is about to take a dump, so you can do something before you get stranded.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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