So I've had this phone for about a week now and when I plug her in to charge, using the provided charger, it takes 3 - 4 hours for it to charge fully. And this is when the phone has still got about 1/4 to 1/3 of juice still left. Anyone else notice this? This is a concern for me as I can hardly get through the day with one full charge and if it takes forever to charge plugged into a wall, it can tie me down uncessairly. Does the battery life improve with use? Some input would be appreciated. Thanks in advance.