My buddy need help on a Losi DBXL
 

So, my buddy bought a new Losi DBXL. He is telling my that his battery only lasts for about a tank of gas. I have a HPI Baja 5SC and I know I can go threw at least two tanks, probably more. Is this right for his Losi battery to only last for a tank before having to charge it up? Is there an upgraded battery if so, which one is recommended? Any help would be appreciated.

How many mAh's does the battery have? In my large scale models i don't use any batteries with less than 3000 mAh, the servos consumes very much power from them as they are more powerful than smaller scale servos.

I believe it is around 2300. I did find him a battery and a bigger box at Killer RC.

Thanks for your reply.