Apple announced some updates to its Mac lineup during its Worldwide Developers Conference Monday, upping the battery life of its popular laptops and improving the components in the computers to make them faster and more efficient.

The new MacBook Air is based on Intel’s latest generation of processors, Haswell, which is supposed to provide graphics performance that is 40 percent faster.

The biggest improvement, according to Apple senior marketing executive Phillip Schiller, is the extended battery life. The 11-inch MacBook Air will go from five hours of battery life to nine hours, Schiller said. The 13-inch will go from seven hours to 12 hours.

The 11-inch MacBook starts at $999; the 13-inch starts at $1,099.

Apple also announced that it is releasing a new series of Airport base stations — which act as networking devices for other Apple products — including a new version of AirPort Extreme and AirPort Time Capsule. The company didn’t announce prices for the new versions of the products. Currently, the devices range between $99 and $499.

Apple executives offered a peek at a new desktop computer, the MacPro, which comes in a sleek, cylindrical case with four USB ports, 6 Thunderbolt ports and support for gigabit ethernet. The company didn’t say when the new desktop will hit store shelves, but did say it will be built in the United States and released “later this year.”

The new MacBook Air models are already in the Apple store online, and will be in retail stores starting Wednesday.

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