Wow...I have an extended warranty; maybe I should just pay the $100 deductible and let them change the battery!
...but then I'd be stuck with the OEM crap again.
Is the battery covered under the extended? That'd be good if so. It seems like a lot of things qualify as "wear items" and I thought this might as well.
I had mine replaced once under warranty when the car was relatively new.
I don't think the battery going dead after an hour of radio play means your battery is dead. It would on most cars, but I have had the LR3 battery drain very quickly in the same scenario, thus, I don't use it for that any more. There is just too much going on behind the dash and the battery can't keep up. Too bad, but that's the way it is.
Good luck. Let us know what battery you end up with. I'm sure I'll have to do is sooner or later. (my truck is in the shop now at 63K for the airbag wiring recall and a "suspension fault"...and I'm happy I bought the extended warranty for that one!)
-todd