pdreyfuss
Veteran Member
I think they are both important. Maybe they say ampere-hours are more important because "any" car or marine starting battery will have high CCA, but not necessarily high ampere-hours. So by specifying high A-h you get both. Just educated guesses here; I don't really know the exact numbers.Yes, I am fully aware of that having worked as an electronics technologist in a lab environment most of my working life. We used to do real capacity tests using an Ah meter and then a more modern Torkel 860.
The question was, how many Ah are consumed during the period the glow plugs are on and I realize that varies slightly.
And the reason for asking is, members here claim the Ah rating of the battery is the most important specification. Well to make that statement, it has to be based on something other than thin air.