The weight is correct on the Tenergy packs. I get them from www.commonsenserc.com on sale for $46 each (2100mah 15C 3 cell). I also get the 8C 2000mah 3cells for $35 for two packs. What I like about these packs is that they truly will put out their C rating for the entire time they are flying. When comparing these to Polyquest 20C packs they perform identically (both 2100mah packs yet the CSrc are 15C rated). The 8C packs really put out and would likely be rated at 15C by any other maker. I say that because most of the other packs I have bought at expensive prices have not put out at the C rating suggested.

Carl