The Energizer brand is all about long-lasting power, and that has clearly figured into the design of Energizer EnergyBook laptops unveiled by French design company Avenir Telecom.

Avenir has been making cellphones, chargers and cables with the Energizer brand . Now its first foray into laptops includes batteries that have so much power they're not likely to be allowed on many flights.

The company hasn't yet released pricing or even weight information on the laptops, but it says that largest of its three laptops, the Energizer EnergyBook Pro Ultra, has a four-cell 13,000 mAh/192Wh battery that can offer seven days of standby time and 28 hours of office use or 11 hours of gaming and graphic design.

You probably won't be spending those hours on a plane: The Federal Aviation Admini

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