We have seen the Exogear line of battery cases for the iPhone 3G and 3GS before. The company has announced a new Exolife battery case for the iPhone 4 that is up for pre-order. The new case is called the Exolife just like the others.
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Inside the case is a 1500mAh battery that promises an extra seven hours of talk time. the polycarbonate case offers protection from drops and the case promises to help reception by keeping the user form covering the antenna with their hand.
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The case will come in black with shipping on July 30 and White shipping on September 30. Either of the cases can be pre-ordered now for $89.95.