My Hyper 9 (home made conversion) was awesome for battery life at the Neo. Even in the 10 minute semi (I was standing next to Maifield - awesome) I drew less than half capacity, so can easily hit 20-30 mins.
I am running a Neu 1512 2.5D, Tekin R1 Pro and two TrakPower 4900mAh (30C). The cells are awesome, 30C unlike the less powerful 5400mAh. I think being lower grip though Neo was kind. I have yet to try on a normal UK track.
Soon I hope
