Nissan has developed a prototype iPhone application that would allow electric car owners to dial into their vehicles and check battery levels.

The application, a working version of which was demonstrated by the company at its research facility in Yokosuka, Japan, links to the car's IT system to check the status of the Lithium Ion batteries that power the car.

Using it, owners will be able to monitor charging of their cars while away from the vehicles. The system could come in handy, for example, when cars are parked at public charging stations and owners want to fully charge the batteries before driving away.

In addition to the basic monitoring of battery level, more detailed information can be sent to the phone that includes the time required for a full charge and the approximate cost.

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