Mind you this is a criminal waste of power. What's your exact application? There has to be a better way around throwing away 11.8 watts of power. Especially when it's a battery. There's no garuntee that your battery can even source that much current to begin with. 1.3 volts at 2 amps only sounds like 3watts, but to get that 1.3 volts you have to waste 11 watts of power. At 2 amps a 1000mah 7.2volt battery will provide that power for about 30 minutes, and that's not going to be anywhere NEAR a linear voltage/current for the discharge. For a NiMH battery pack this would be strainging the pack more than you should. Can you detail more of your project? I'm sure a much better sollution could be found if you supplied more information.