Just bought the Note few hours ago. The Sales told me that I should let the battery drains until I cannot turn on the device. Then, fully charge the device. However, from the quick start guide from Samsung, it states that before using the device for the first time, one must charge the battery. Which way should I follow? I guess just like the Apple MacBook Pro, the first way might recalibrate the battery so that the battery life indicator from the Note becomes more accurate? Thanks.