Depends on what your running on your truck. Should last a good long while if your running non-digital servos. Will still get decent run time out of it though. The OFNA 1700mah one is about as big as your going to find that is still 2/3A type cells. There are a lot of 1600mah ones which is what I run in my revo. I run homeade NiMH AA packs in my jato and savage. 2250mah... I run all day on those.
I have the same brang, (Tenergy), hump pack, but mine is the 1600mah. Just got it mounted though and still need other parts before I'll be able to try it out.