Quote:
Originally Posted by onewhippedpuppy
If I remember correctly we upgraded my son's 2000 mAh battery to a 4500 mAh battery in his Slash, his run time basically doubled and it was noticeably faster. 2000 is a pretty basic battery. The more voltage (cells) and the higher mAh means more run time and faster speeds. Do some research on your ESC to determine the maximum voltage it can handle. Good batteries make a big difference.
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Big +1 on the grass. Even if you had more battery life, or kept switching packs, motor heat is going to limit you on grass, although how much it affects it depends on the type of grass.
High performance RC's are going to put a fairly heavy load on batteries, and a heavy one like a E-maxx is going to increase it even more. Going to a brushless motor can do a lot for run times. Also, the higher the MAH rating of a battery, the longer life you can expect.
As for your question about what uses the most battery life, the stuff at lower RPM/higher torque is what uses it. The amp draw(and torque) decreases with RPM, so the truck packs a punch off the line, and peters out. "rock crawling", where the truck is very near stall current, will hit you the hardest unless you have some really high gear ratios. If you're cruising at lower speeds, run it in 1st gear for better battery life.