I just got a Blackberry Curve a few days ago, and I heard theyre supposed to have amazing battery life, but I plugged it in all night last night to charge and I woke up this morning, pulled it out of the charger, and the battery status shot down to 80%! And now, 6 hours later, it's down to 50%! What gives? Is there any kind of power conserve mode I can put it on or something? HEEELLLPPP