The other drawback is when you put 2 EN-EL3 batteries in to MB D100, you'll never know which one is empty first. I have to wait till both of the batteries dead to recharge them. (As they're not lithium, I heard, the best is to recharge when it's really empty)
Perhaps Nikon call tell us if we insert 2 batteries which one (left or right canal) is used first.
Pinky Mirror Nikonians@Jakarta,Indonesia-- it's near Bali, if you don't know where it is