cant help you. I dont screw with the battery at all. All I know isthat Ford puts 250 nickel hydride batteries in series =330v/ 20kw so its about 60 Amp, But I have no idea about amp hour ratings for anything.
The dirty secret with all hybrids is NOT to screw with any after market **** that messes up the amp draw. I knew several folks atht added different "Big dick" sound systems that messed up the circuits.
The standby and "instant on" and p[ower supply **** are all these "Ghost draws" that need constant start ups. I let mine run down once when we went away for about 2 weeks and I let sparky just sit there. Fortunately there is a charge station in the car so I hit it with a trickle for a day and she came to life again.
POrsches are famous for all this ghost draw crap too. The newer ones like the Red Pepper have all sorts of ghost draws, that they reccomend no sitting around for longer than a week in colder weather.