battery HELP on lst2 losi mini
 

i just purchased the mini losi lst2 it has the stock Losi 1100mA pack, my question is can i use a battery i already have its a 8.4 2600mA it doesnt fit in the truck ,it made for the mini t truck but i can retro fit it ,i need to know if it will cause any damage if i choose to use it .here are the battery stats

FEATURES:

* Voltage: 8.4v
* Cells: 2600mA AA NiMH
* Discharge rate: 8 amps
* Connector: standard Losi Mini-T
* Wire: 18ga fine strand silicone
* Size: 3.00" X 1.93" X .56"
* Weight; 7.0oz
* Voltage: 8.4v
* Cells: 2600mA AA NiMH
* Discharge rate: 8 amps
* Connector: standard Losi Mini-T
* Wire: 18ga fine strand silicone
* Size: 3.00" X 1.93" X .56"
* Weight; 7.0oz