Left my hazard lights flashing for 5 and a half hours and....................
 

the battery showed no weakness when starting-amazing

Sounds like about 25 amp hours

If I did that in my old GM I would need a jumpstart afterward for sure

Were you just checking your system, or did you have a serious problem?
 

Gotta look out for our friends down-under!

5.5 hours X 10A X 50% duty cycle... sounds about right...
 

That shouldn't kill a good battery.

Had to park in an ambulance bay outside the hospital and when I moved
 

I forgot they were running-5.5 hrs later when I emerged from the hospital they were flashing away.
At first I thought the alarm had been triggered.