Mophie's been around for a while now, selling cases and external batteries for your iPhone 3G, iPod Touch 2G, etc. More recently, they've announced that their latest product, the Juice Pack Plus for the iPhone4, will soon be coming in extra colors - Cyan, Magenta, and Yellow (seen below). These case-batteries will be available in January, while the plain Black version is already available now.

 

The Juice Pack Plus has 2000mAh, offering roughly 8 extra hours of talk time (useful in case you're aiming to get the Guinness Record for World's Longest Phone Conversation), or 7 hours of internet use on 3G (much easier than switching over to a desktop or laptop, of course), or 44 hours of extra audio playback. Some would prefer this case over others because of its speaker-rerouting system as well: sound is redirected from the bottom of your iPhone, to the front, offering better sound quality. A USB cable is provided so that you can plug in your iPhone and let it sync/charge without having to remove the case.

A previous product, the "Juice Pack Air" is also available for the iPhone 4G, but doesn't offer as much battery life as the new Juice Pack Plus. Unfortunately, it also does not come in the retro colors seen above (personally, I'd rock the Cyan one).

Honestly though, in case you're looking for a more unique look to your iPhone, and don't ever want to have to worry about your phone dying, this may just be the product you've been looking for. Morphie's website has the full details, and you can order the products directly from there.

Now imagine using this case in conjunction with the umbilical-iPhone-cord - maybe then you'll nab the Guinness Record for Most Unique iPhone Accessories too.

Source: tuaw.com for the picture

Cell Phone Battery, Cell Phone Charger, Cell Phone Power Adapter