Join Date: Feb 2011
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Am I asking too much from my batteries?
I replaced both my batteries with 850cc costco batteries. The stickers on them say that they are from March 2012, I bought them last month so I'm as sure as I can be that they are new.
I put them on a smart charger to top them up, 4 hours on the first one, I took them off the truck and charged them in the garage. The first one was at 12.3 volts when it started and was at 12.9 when it ended.
I took the second battery off the truck and it took 5 hours to reach the same voltage.
The first battery is at 12.63 volts now (5 hours later), and from charging the batteries last time I know by morning it will be no higher than 12.5.
I have read that 12.5 is a 50% charge for a battery. Am I expecting too much for my batteries to be above 50% 18 hours after charging without being connected to the truck?
They seem to normalize at 12.3 when both are connected to the truck. That's the minimum Ed at ficmrepair.com has listed for a battery voltage to keep the warranty on the repair I just had done to my ficm, so if the batteries are there now, what happens in a year?