Hi Folks Hmmm... I am so torn between the ZAGG Sparq 2.0, the TeckNet DualPort 5000mAh or the NewTrent iCruiser 11000mAh. I live in the UK so the advantage of a fold out plug on the ZAGG is lost sadly! Which one would you recommend? Primary use will be to keep me going for 4 night festivals. Thanks! Joe.