http://androidforums.com/sprint-htc-...ah-review.html
awesome reviews for the mugen battery you can get them on ebay or from their site, even better results than the sedio because they use lithium polymer, if you use discount code 5off2010 on their site you can get it shipped free for around 32 bucks, im gonna wait to see how the evo does and might get one after, gl!