Ya know, I've been finding that having the extended battery (given it's rather excessive size vs case form factor) isn't really worth it as much as I had thought. Having one of the power extenders handy though has seemed to be the better option, at least for me. Typically under normal use I easily lasts me a good 16 hours or so on the normal battery, and if I'm watching movies or playing music, the extender works well, unless of course I'm mobile, and that's the only real time the extended battery works well. But if I'm doing any battery draining things like movies or music or games, I'm typically either stationary, or using another device to do the music/movies/games.