I keep the 911 on a battery tender, but I need to replace my current battery. Is there a battery that is preferred when you know you are going leave it on a tender?
I keep the 911 on a battery tender, but I need to replace my current battery. Is there a battery that is preferred when you know you are going leave it on a tender?
I have a $100 Battery Tender brand one, and a $29 Harbor Freight one.
3-4 years in, they both seem to work equally well.
No preference of battery that I know of. It's possible that the AGMs are better, but the bottom line is that all (traditional) car batteries are a balanced combination of acid and lead. One eats the other and it will have a fixed life... longer or shorter depending on how it's used, but there are only so many times the molecules can react back and forth before they are done.
The whole thing is basically an acid reaction that gives off electrons in one direction, and you reverse the reaction when you force electrons back into it. I think you're probably doing the right thing with keeping a trickle charger on it to keep that "pressure" on the reaction and preventing the acid from going to town on the lead.
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