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Nissan has released new information about their hybrid system which will likely debut in the 2013 Altima.

Developed in-house, the fuel-efficient powertrain is based on the system used in the Infiniti M35h. It will feature a supercharged 2.5-liter four-cylinder engine, an electric motor and a lithium-ion battery. There's no word on performance specifications, but Nissan says it will be as powerful as a 3.5-liter engine.

In releated news, the company announced an updated continuously variable transmission which promises to improve fuel efficiency by as much as ten percent. It will be equipped on a variety of models and should be available on engines with displacements from 2.0- to 3.5-liters.

Note: 2010 Nissan Altima pictured

Gallery: Nissan announces new hybrid tech, improved CVT transmission

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