The latest battery pack from DigiPower is Boost Elite ($60), which despite its "been there, done that" iPhone 4 battery concept actually brings something new and smart to the table. In addition to including a 1400mAh rechargeable battery that should nearly double the iPhone 4's run time, plus a USB cable capable of refueling the cell, Boost Elite uses clear, soft TPU plastic edging to make iPhone 4 insertion and removal easy, as well as providing…
