ORIGINAL: Missileman
Those hydromax packs are great. You won't have any trouble with them.
I can fly 7 servo planes all on a single charge.
Keep in mind when figuring how much battery will be used that flap and gear servos are not used through most of the flight so won't draw a whole lot provided you have your end points set up good.
I have a standard servo on the flaps, is that normal or am I supposed to use one like I did for the retracts? This is my first flap and retract setup.