Hi all, 1) Anyone know how long would it take for the battery to be fully charged ? 2) Is there a way to check the percentage of the battery status? The status on mine showed "charged" (from charging) but the battery icon on the top is only half-filled (with a + sign) with blue color so I wonder how full the battery is after it is charged?? Since it is the first time I charge the battery, should I leave it to be charged for overnight?? 3) How long would the battery last?