[Unsullied_Spy]

LiFes should be just fine. With a brushed motor I would expect that you're going to get the same power, they don't put enough load on them to make a difference. I don't think the Titan pulls enough amps to keep the batteries warm on their own, so I guess that it's possible that they could get too cold even when cozied up in the Summitt's battery compartments. Might want to go with the LiFe packs just to be safe, plus you can charge them faster if you need to get your fix a little more often (if not in the Winter, you can sure use this in the Summer).