problems with my thunder tiger stadium truck

Hey
So I am completely new to r/c and could use some help. Here is what i have:
1:10 stadium truck(thunder tiger)
1:12 mini trophy truck(hpi)
Onyx100 charger
1500 nimh (7.2v)
3000 nimh (7.2v)
3000 nimh (8.4V)
3300 nimh (7.2v)

Here is my problem when I use the batteries in the hpi mini it runs great. But when I use them in the stadium truck it runs for about 1 min and then the light on the receiver flashes indicating that my battery is dead.
Does any one know what causes this problem

Yes your staduim truck esc is most likely setup for lipo at the moment and your esc is going into LVD ”low voltage mode” which is resulting in your 1MIN Run time. Lok in your manual on how to program the esc for nimh/nicd ;)