Now that we've all been using our Iphone 3GS for a good few weeks now what do you consider "Normal Battery Life". I'd say with Locational Services off, bluetooth off, using mostly wifi or 3g I can get around 5-6 hours of useage. Has anybody found any tips for saving battery life? Can anybody post up their experiences ? Apple say you should get around 5-6 hours of usage so I am guessing this is ok.