As much as I hate to do this, I think we are going to send my sisters birthday gift back. Her Kind Fire HD. From what she has told me, she mostly reads on it, but battery life is horrible on it. I rarely she her with the HD in her hand, usually its her old school kindle with 3g and keyboard. I am really disappointed in this! I was actually thinking about the 8.9" version when it came out to have something I could tap into my prime membership with.
I am not sure if this is normal, but she says it needs charged about twice a day! She even turns it OFF when not in use.
So, I gave her a choice, first to call up amazon and talk to them about it, then see if she wants to return it. If so, I guess we will pre order a couple wifi only paper whites. One for me and one for her. Our parents will get our old 3g kindles