Well for batteries so far I am going with Zippy R 4s 4800mah haven't purchased 5/6s or Monster. Waiting for combo, charger should be in following week, right now I'm testing CRT 4s Zippy R 4800mah Mamba Max, with novak 25mm fan no Bec Fiegao 6xl no heat sink. Nomadio controled 62/13 tooth spur pinion 20k 7k 3k diffs. big bore 16mm blue springs. So it has power where i like it with room for improvement is on the high end as of yet. There have not been any heat issues esc 100 max motor 100 max batt temp low.