Hi mate I raced my Losi 2.0 electric at Nene Valley with this lipo
http://cgi.ebay.co.uk/Intellect-Lipo...item3cb6129a3c and lasted 20 mins no problem (well had 2% in the lipo after the race) so it can be done. Take it smooth, smooth with the throttle and dont max it out down the straight. I would recommend these lipos any day mate
Hope that helps
Chris