No problems at all. Good battery life, great performance. I'm a pretty heavy daily user and I usually still have 30% left when I go to bed (around 10p) after taking it off the charger around 5:30a. On moderate use, I can get two days of usage no problem. On days of extreme usage and heavy game playing, I can still make it a full day but I need to race to charger by bedtime. Now, this may not be as good as other people claim, I find it plenty good for me especially considering that I have nothing restricted in the background, 4 email accounts sync whenever they want, and with battery saver turned off.