Originally Posted by
cyccommute
Batteries.
Since you’ll want to run the lamp at 14.4 V to get the best light output, you’ll need to wire the RC car batteries in series. You’ll need to make a harness to do this that will take the negative pole from one battery pack and connect it to the positive pole of the other battery pack and then make sure that it all connects to the light. This is easier than it sounds. I use Dean’s and my connections are complicated and ugly…but they work.
I'm guessing you went with RC NiMH batteries instead of Li-ion because you had them already? Myself I have a whole bunch of AA NiMH so I made a 14.4V battery out of them by gluing together two 6AA holders (<2$ each from mouser.com).
Good recommendation on the cage rocket and Maha C777 btw; I just ordered the former and am seriously considering the latter.