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The Optima Blue Top I installed in the B190 in 2008 was still in good shape when we sold the van last fall, over four years later. I installed a PD9260 at the same time as the battery and basically let it handle the battery automatically. I'd check the charging mode, but I never changed it after I originally installed it.
I always had at least an electrical hookup (and kept it plugged in at home most of the time, but not always). If you're using your batteries a lot more, running them down more frequently, they might last a shorter time.
My good experience with the Blue Top + PD9260 is why I went with the same setup for our trailer (albeit with three batteries, instead of just one). We've done some camping in the trailer without electrical hookups, and I'm sure we'll do more, so it'll be interesting to see how long the three batteries last.
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1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
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Hi, my batteries continue to last about three years. My 2007 batteries have been replaced [dated 08/10] and the ones I have now will more than likely have to be replaced within a year. Still using Costco batteries.
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