Add this to the list of things we need; the Mili PowerSpring 4 a extended battery/case shipping today, for $85 on Amazon.
Is the latest in a series of iPhone 4 battery packs. The Mili promises to double your battery life, all thanks to its 1600mAh capacity Li-Pol battery. It also claims to be world's thinnest.
With the PowerSpring 4 Extended Battery, the iPhone 4 can have up to 36 hours of audio playback, 10.6 hours of video playback, 6 hours of talk time, and standby time of 360 hours.
As with almost every other case/battery pack it also succeeds in making your iPhone 4 look like and iPhone 3GS. We think it's a plot.
From the Manufacturer:
MiLi‚Äôs PowerSpring 4 Extended Battery‚Äôs lightweight but sturdy case blends style and functionality into one rechargeable, smart battery.
You do not need to take your iPhone 4 out of its PowerSpring4. This brilliant and handy pack of energy will assure you‚Äôll always be on the go. You can simply recharge and sync it at home or at your office.
Reliable and Durable
All PowerSpring 4 products have passed the rigorous tests to comply with Apple‚Äôs industry standards. After all, they were especially designed for iPhone 4.
MiLi‚Äôs PowerSpring 4 Extended Battery does not only keep you connected longer, but also protects your iPhone 4. The status indicator also tells if you are receiving essential calls or have to send a vital email.
Even if the current iOS 4 upgrades intend to fix the battery problems in iPhone 4G, let‚Äôs admit it, you call for a more enhanced solution. With that, MiLi introduces the the first ever portable external battery for iPhone 4G!
It is amazing how an entire industry has been created by and for the iPhone's battery woes.