I understand chrissy p's point totally. If the top drivers use 3 sets of tyres in 1 meeting then most other people will follow suit. If they use 2 sets then everyone else will use 2 etc. I cant see any benefit in using Lipos yet... And Im not sure about Lipo's being used in every day consumer electrical goods. Lithium ion batteries are commonly used but not lithium polimers which explode...
Everyone with lipos should watch this...
http://www.youtube.com/watch?v=z3o_2mwRPdw
If anybodies lipos blew up like that they could seriously harm someone....