I have an ipad 3 yes I know it old an so forth but does what I want so please don't tell me buy a new one. It use it with duet on my macbook air and for youtube, boombeach in bed in evenings. I'm using a genuine apple ipad charger not iphone charger that the last owner was using. If I use youtube when plugged in the battery still drops. Is this normal? Is youtube a real battery drain? if on battery not plugged in in goes for days and days just use in evenings. I thought it would still charge but slower. Charges quite quick if powered off.