Same here. It got pretty warm on the first full charge, but not as much since then. I figure it was operating in rapid charge, using the 15v output for an extended period. It was never so hot that I was really concerned.
What has amazed me since I got it on Wednesday, is that I use it on and off all day (mostly with the keyboard attached), and it still shows in the mid 90% range at the end of the evenings.
I know having the keyboard battery running in parallel may be causing a false high reading, but still, I like it. I don't think I could deplete it all in a single day. I'm really pleased with that, along with everything else I have the TF. It's a winner.
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