Yes as stated you would use 2 amp hours of the battery capacity
Only one battery?
Then because of perkut effect you would use a little more than that
That's the chemical reaction verus time thing
Where a battery rated at 100 amp hrs , only if you use less than a 5 amp load
Use more the capacity goes down
Means you could use 5 amps for approximately 20 hours to reach total discharge , which is bad
But if you use 12 amps you can not do that for 8.5 hours, instead it might last 7 hours or maybe less
But in your case of only ten minutes, the effect on total capacity in minimal
Just like driving your vehicle
Pick a flat road do 50 mph get better mileage, than going up hill at 60 MPH