I just received my brand new 50D today. I've had the battery charging since about noon today but it's still showing the amber light on the charger. When I first plugged it in, the charge light was flashing for a while before it became solid amber. It's been about 7 hrs but the charge light is still amber. Does it take this long for a brand new battery to charge??? I'm dying to use my new 50d but I want to make sure the battery is fully charged the first time!