Be aware that there are two types of MHL adapters. 11 pin and 5 pin. The Ultra supports 5 pin, and only Samsung devices supports 11 as far as I know. I have a cheap 5 pin from Ebay and it charges the Ultra when it's connected. That's the point of the whole "plug in your charger". That's only MHL 1.0 or 2.0 though, and I belive 3.0 which is pretty much all new this year supports direct plugging, and you won't need to plug a charger in to use it. That's either 2.0 or 3.0, I'm not sure. I belive the Z1 supports 2.0/3.0, but I'm not sure about the Ultra.
Yes, this is a messy post, but that happens when I'm trying to remember something I read once 6 months ago
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