try hobbycity..... look for the "zippy" line of li-po's. they are AWESOME li-po's!!!! ive bought a dozen 3S 2200mAh 20C packs in the past for my 450 class heli's, and they are just as good, IF NOT better than the expensive brand name packs.... and their 6S packs are the best! 3s packs can be had for under 20.00, and 4s packs are around 25-30 bucks as well..... they cant be beat!

as a matter of fact, i bought two Outrage 6s, 3000 mAh packs last summer, and at the same time, a couple zippy 6S, 3000 mAh packs for my Trex 500's..... the zippy packs outperfromed the Outrage packs, and one of the Outrage packs puffed up after 5-6 cycles! and im STILL using the zippy packs to this day! the outrage packs cost me 140.00 each, i believe, and the zippy packs were around 45.00 each..... its a "No-Brainer!" ;-)