I don't drive every day, sometimes not for a week or two, while my wife is likely to drive somewhere each day...therefore I like to maintain my vehicle batteries just to make sure all are up to snuff.

Right now, she's been driving my HHR Panel (while I'm still working on her Cobalt's ABS/brakes), but during spring-summer, she switches to her GMC pickup for hauling garden supplies home (almost everyday). Meanwhile, I've been driving the X5 sporadically. The daily-used HHR isn't on a charger, but the Cobalt is on a 1amp Autozone charger/maintainer, the X5 has a 1.25amp Battery Tender Plus c/m, and the GMC is hooked to a 2amp Amazon Basics c/m.

My Chevy 2500HD pickup is seldom needed, and often goes 3 months between uses (I've converted the bed to haul my camping supplies, and it stays on an Amazon Basics 2amp c/m in-between camping dates, and the camping trailer's AGM battery is on a 1.33amp Battery-Minder c/m, too).

I use these charger/maintainers to de-sulfate and float-charge the batteries, also keeping them from freezing in the winter, and to ensure the vehicle is ready to go (I also use Stabil in the fuel to help that, too). The trucks get the 2amp chargers because I can easily/periodically check the electrolyte level (especially in Texas summer heat), whereas the X5, HHR, and Cobalt aren't as easy to check. The X5 battery showed signs of overcharging this summer, using an Amazon Basics 2amp c/m, so I swapped to the lower amperage Battery-Tender that previously was in the Cobalt. I've had that c/m for 10 years, and the Battery-Minder c/m on the trailer battery has been doing just fine for 10 years on the Optima Yellowtop, so it doesn't need supervision.

Ever since I started using (smart) battery charger/maintainers, about 15 years back, starting with the dual batteries on my Chevelle drag racing car, I average about 10-11 years on every battery. Previously, I was swapping batteries every 4-5 years, if lucky. I advise everyone to utilize a battery charger/maintainer. They work for me.

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01 BMW X5 E53,3.0i-5L40E, 7/13/01
topas-blau,Leder-grau,"resto-project car"

Here:
14 Lexus ES350,3.5L-U660E
09 HHR Panel,2.2L-4T45E
04 Chevy 2500HD,6.0L-4L80E
98 GMC Sierra 1500,5.7L-4L60E

Gone:
66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake
08 Cobalt Coupe,2.2L-4T45E
69 & 75 C10s,350c.i.-TH350
86 S10,2.8L-700R4
73 Volvo 142,2.0L-MT4
72 & 73 VW SuperBeetles,1.6l-MT4
64 VW,1.2l-MT4
67 Dodge Monaco 500 2dr ht.,383c.i.-A727
56 Chevy 210 4dr,265c.i.-PGlide