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Some people prefer to live a green lifestyle, but find it difficult to conserve energy when it comes to gadgets. The Sol Solar iPhone 4 Battery Case may help ease that transition.

The concept of the Sol Solar iPhone 4 Battery Case is pretty self explanatory. The cover basically uses the sun to charge your smartphone. The benefit here is that it's eco-friendly and with the wide panels, drawing the rays won't be difficult at all. There's also a built-in battery that also helps extend battery life effectively. The case itself is durable, lightweight and will do an effective job of protecting the phone from bumps and scratches.

The Sol Solar iPhone 4 Battery Case may not be as slim as the other cases; however, it will do its job in an eco-friendly manner, which is definitely a welcoming aspect.