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The Ultrabooks are also slightly thinner as HP tried to stick to specifications set by Intel, said David Conrad, director of product marketing at HP. Ultrabooks cannot be more than 21 millimeters thick, according to design criteria set by Intel.
But Sleekbooks are comparable to the Ultrabooks on battery life, which is between eight to nine hours.
The Ultrabooks also have some additional features that the Sleekbooks don't, Conrad said. The Ultrabooks boot more quickly, have antitheft features typically baked into Intel's latest Core processors, and can also resume from standby more quickly.
Intel in the past has said Ivy Bridge ultrabooks will also blend in tablet-like features such as touchscreens, but HP officials declined comment on when such models would be introduced.
The Envy Sleekbooks come in screen sizes of 14 inches ($699.99) and 15.6 inches ($599.99), and will ship worldwide starting on May 9. The Envy Ultrabooks come in screen sizes of 14 inches ($749.99, available on May 9) and 15.6 inches ($799.99, available on June 20).
HP also announced additional ultrabooks for consumers and enterprises with screen sizes between 11.6 inches and 14 inches.
HP's new Envy Spectre XT is a 13.3-inch ultrabook that is only 14.5 mm thick and weighs only 1.4 kilos. The laptop has 128GB of storage and a choice of Intel's third-generation Core processors. The ultrabook will offer seven hours of battery such as Hp AT901AA battery , Hp HSTNN-DB0G battery , Hp HSTNN-I71C battery , Hp Mini 5101 battery , Hp Mini 5102 battery , Hp 579027-001 battery , Hp HSTNN-N50C battery , Hp HSTNN-IB72 battery , Hp Pavilion-dv4 battery , Hp Pavilion-dv5 battery , Hp Pavilion-dv6 battery , Hp Pavilion-dv6t battery life, and will become available in the U.S. on June 3 starting at $999. HP declined to comment on worldwide availability.
The Spectre XT is a thinner and lighter cousin of the Spectre 14, which was introduced earlier this year. The Spectre 14 has features including wireless audio and NFC (near-field communication).
There is also a healthy demand for ultrabooks in enterprises and HP is building up the product portfolio, said Scott McCammon, worldwide product manager at HP. The company currently offers the Folio 13 ultrabook, which started shipping last year.
HP on Wednesday also announced the top-of-the-line EliteBook Folio 9470M ultrabook, which has a 14-inch screen and offers nine hours of battery life. The ultrabook is priced starting at $1,149, and will ship in October. The ultrabook is 1.6 kilos, 19 mm thick and can offer nine hours of battery life. An optional slice battery gives the laptop 20 hours of battery life