Posted in hardware: Reposting here-Anyone tried this 3000mAh battery case?

Hey guys, check this out.

I love my iPhone4 and compared with other phones Apple did a great job with battery life, but I'm a traveler and sometimes I take long runs without getting a chance to charge the phone. Looking into buying this battery case here: http://www.mugen-power-batteries.com/apple/iphone-4/mugen-power-3000mah-battery- case-for-apple-iphone4.html

Has anyone dealt with these guys before? I asked them questions on their Facebook, they seem legit.