HP's compact EliteBook 2540p and 2740p have 12-inch screens

Like the prior-generation 2530p model, the 2540p can be ordered with or without a built-in optical drive. Units without an optical drive, can take 2.5-inch 7200RPM SATA II hard disk drives ranging up to 500GB in capacity. Units ordered with an optical drive use smaller 1.8-inch 5400RPM SATA II drives, ranging up to 320GB in capacity.
Intel announced the Core i series of processors last year, but to date the chips have been limited mostly to desktops and large-screen laptops. HP's compact EliteBook 2540p and 2740p have 12-inch screens and weigh in at about 3.4 and 3.8 pounds, respectively.
The 2540p can be configured with standard-power Core i5 or Core i7 processors or a Core i7 that draws less power--a so-called low-voltage processor. Graphics are provided by Intel's integrated graphics silicon.Battery life for the 2540p is rated by HP at up to 10 hours with a nine-cell battery and 8 hours with a 6-cell battery.
HP has also updated its convertible laptop--which can be used as a laptop or a tablet--with the 2740p model (updating the prior-generation 2730p). The 2740p has specifications similar to the 2540p but does not offer the option for a 2.5-inch 7200rpm hard disk drive.
HP rolled out other business models too on Monday. The ProBook 4320s (13.3-inch screen), HP ProBook 4420s (14-inch), HP ProBook 4520s (15.6-inch) and HP ProBook 4720s (17.3-inch).

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