Gosh, I wish I was more technical and could tear apart the iPhone holster charger... do some soldering ... and make it fit perfectly for the EVO Hey Seido - would you build this thing already?! What are you waiting for??? *sigh*
A type of battery extender necessary for those less fortunate to have chosen a device with a non user replacable battery (see iphone).
I mean like, is it a holster with a plug in the bottom and an extended battery in the case? I've never heard of this type of thing.
a while back someone made one for iphones Amazon.com: New Trent ultra-pack IMP880 8900mAh External Battery pack for iPad, iPhone 4 4G, iPhone 3G 3GS, iPod, Motorola Droid , HTC Android Phones, Blackberry: Electronics: Reviews, Prices & more There are multiple sizes of these types of external chargers....make one!