How exactly are people getting long run-times?

[Marvin]

I'd like to know how people are getting over 20 minutes on a single battery without stupidly high capacitys, weight or voltage.

How?!?

I simply cannot get the run-time out of the same batteries as some of you guys.

My current set-up uses a 6S 6100mAh battery to get just over 20 minutes on the track, but as a result the car weighs 4.1kg! That's truggy weight, but it's a buggy!

My original set-up was 4S 4350mAh which would earn me 11 minutes at a push. I can't do battery changes as I'm just not quick enough to make up the time lost to the nitros. Is it a case of gear down to less than the nitro buggies to get a bit of economy?

Have I gone the wrong way? Do I need smaller batteries, and a far lighter car?

Please help! I'm at my wit's end.