i just got my mugen 2400 ext battery in! Cover fits flawlessly. when i popped the batt in an hour and a half ago, it had a 55% charge on it. I've been bluetoothing music and browsing since then and it hasn't budged! This thing is gunna be phenomenal, i'll update in a few days.
This is the best lookin battery cover i've seen anywhere and the entire phone fits my hand WAAAAY better! Check out NakedCellPhone on ebay, i know its 80 bucks, but its def quality all around. I'm the kind of person who would rather spend the extra money on something i KNOW is quality, rather than rolling the dice and hoping nothing goes wrong. Seller is helpful and delivers out within 24hrs with tracking number.
http://cgi.ebay.com/EXTENDED-BATTERY...QQcmdZViewItem