ORIGINAL: CraigG
I asked about the advisiblity of using my Duralite that was showing 7.3 to 7.4 under load after a fresh charge. He said that although it would probably be OK to use if checked frequently, it was an indication that the battery was losing capacity and he really did not recommend using it in an expensive jet.
I have found this statement to be incredibly accurate regarding Lithium Ion Batteries regardless of manufacturer.
That being said, for whatever reason, I have found TroyBuiltModels Batteries to have less of a failure rate than Duralite, and I don't know why.