Ok so i know that ipad's are not charging with older MacBooks via USB. But I am trying to charge my iPad with the 10w charger while using it. My battery is going from 17% to 18% to 17% ... Back and forth. Will iPad not charge while in use? Of note I am using a longer USB cable to connect to the 10w iPad charger but that shouldn't make a difference, no? How long is it taking people to charge iPad and is it charging for you while in use?