Very, very true!
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I dropped by a battery store today and had them run a test. Said was was 86% charged and showing 12.6-12.7 volts. The Interstate AGM battery is rated for 900 CCA, but it showed 1054 CCA today. I plan to run her a bit longer tomorrow and have another test to see if the & of charge rises.

 

That should be fine (unless there's a power drain fault - read threads about quiescent current if so).