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AC Delco all the way for my coupe, 7Y-7YR. pricey but original, I just replaced the original one and that was in the car since 99!!!!! 10 years!! i guess the guy before me maintaned the battery through winter months and so on. I think i paid 186 when it was all said and done, but im happy with it.
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Just started on my second Optima Red Top 34/78. My first one lasted a little over 5 years and since I was noticing a gradual lowering of the system voltage, I replaced it before it went completely.
on my 3rd battery since I got the vette in August '05. Not sure how old the battery was when I bought it, but in July '06 I replaced it with an Energizer from Sams club. Then again in July '07 I had to replace that one again with an Energizer replacment from Sams club. Recently had the battery dying and bought a battery tender, don't know if that'll bring it back or not, may have to replace the battery again. Usually try and drive the vette at least once every two weeks if not once a week even during the winter. I have never had such battery issues with any car besides this vette, my GN sits the same amount and only replace the battery every 3 years or so.
I replaced the original AC Delco (that fell apart and leaked the contents all over the wiring harness\PCM) with an Optima Red Top. I got 6 years out of it before it died. I put another Optima Red Top in it but like a few others stated it won't hold a charge for more than three weeks. I don't drive it as much anymore so it is easy for the battery to choke....just ordered the battery tender jr. after a Camaro buddy of mine suggested it. His 69' only makes it out once every 1-2 months so he said it helps out quite a bit. The tenders are relatively cheap too.