Thanks Guys, i ended up purchasing a New Trent charger at http://www.newtrent.com/store/iphone...tery-pack.html
It charged my phone about 4 times (from around 20%) so i think their advertised of 350% is pretty accurate. This has been one of the best purchases i made for awhile. I got back from my trip and was glad i made this purchase. Saved me a lot of time from not heading over to a plug. I was taking videos and photos as well as using my iphone as a GPS during my recent trip to NYC. i think i might give their iCarrier a try down the road. Also, i did find out that iDealpoint is actaully New Trent's authroized amazon distributor. but even with that said, i'd say still go direct, play it safe.
Again, thank you all for your inputs!