I did a good test yesterday on 4g. ran yahoo video chat for about 30 minutes, dl around 120 mp3's had over 40 emails and 100 or so text. streamed pandora browsed the internet dl some big files around 400+ mb all in the course of 2 hours. i started at 100% but other thatn the initial 20% drop at first i made it til about 630 pm before i had to charge. mind you i was up and out of the house around 330 am. i really am happy with my battery life with the stock battery. i do have a charger in every vehicle and i charge from the time i go to sleep and wake up. i dont see what people are so displeased with,.