Actually having an Evo ill just say this.. most of the time when you see people claim to have crazy long battery life its mainly because they dont use half of the features of the phone. Like disabling background data, 4g, not using facebook, twitter, etc. I dont care what type of method you use, if you actually USE the phone and all of the features itd be dead by noon without a charge. And this is coming from someone that actually uses one of the SBC kernels. Battery life is simply terrible unless youre not using it to its potential.
They most definitely need to have that in order with the 3D.