Varied iPhone apps always make us indulge our iPhone. However, the limitation of battery life can’t always make us enjoy iPhone to our heart’s content.
Here is a solution for this problem, iPhone 3G Portable Power Dock, a case with a 2400mAh battery. Although it add the thickness of iPhone 3G, yet you get much more battery life. And moreover the case can keep your iPhone from crashing. iPhone 3G Portable Power Dock integrates a built-in speaker that can boost the volume level of iPhone.
iPhone 3G Portable Power Dock is priced at $39.99 USD. You can get it from ThinkGeek. But notice the gadget only fits iPhone 3G.