Released today, the Third Rail iPhone 4 case from Third Rail Mobility takes a fresh look at the issue of smartphone battery life. The case is designed to be as compact and dynamic as possible, the only additional real estate present in comparison to a traditional case is a small nub of circuitry on the docking end of the phone. This smart circuitry, combined with their smart batteries offer a superior level of control and customization when it comes to mobile charging.
Third Rail Mobility, a family owned and operated business, has created a very functional, forward-looking product with this new case. The system can be purchased from their site for $90 which includes an iPhone 4 case and one battery.