In another first-of-its kind venture, InCase has come up with a iPhone accessory that is designed to do multiple things at one go. The Power Slider for iPhone™ 3G is an all-in-one accessory that offers protection, integrated syncing and charging capabilities and to top it all – doubles up by providing extended battery life.
This case cum power solution is available in black and looks quite sleek. And this sleekness does not compromise quality as it comes with a durable, lightweight hardshell construction. This entire structure, is wrapped around with soft-touch coating.

How it doubles up as a battery backup provider? The makers has this to say:

…the Power Slider more than doubles the battery life of iPhone 3G while providing complete device protection and the ability to sync without removing iPhone 3G from the case…. Integrated rechargeable lithium-ion polymer battery more than doubles the battery life of iPhone 3G.

More about the battery:

1. Optimized power management system provides continuous charge to iPhone 3G internal battery
2. 5 light LED battery status indicator
3. Rechargeable lithium-ion polymer (1330mAh 4.2V)
4. Custom designed and engineered specifically for Power Slider
5. Capacity equals approximately 120 percent of iPhone 3G
6. Efficient circuitry allows for slim design and maximum power output

In a nutshell, this extended battery allows you to boost up the standby time up to 330 hours, provides audio playback for up to 26 hours. more talk(5 hours on 3G network and 10 hours on 2G network), 7 hours of Video playback and more internet time (5 hours on 3G network and 6 hours on Wi-Fi).

Some more reasons you want to get hold of this:

1. Charging and syncing possible without removing the iPhone 3G from this case. It can be done by using the custom USB cable.
2. Short circuit is prevented through the advanced lithium-ion polymer battery cell technology. This also prevents provides protection from extreme temperature.
3. Compatible with USB charging ports that provide 5V at 1A output
4. Custom USB 2.2 cable specifically designed for Power Silder
5. Provides high capacity charging and data exchange for optimal charging and syncing

The price is not yet out. However, one more reason to buy this case is that it is “Works with iPhone” certified by Apple! Go to the product website here to know more about this accessory that will go on sale from November 28th.