Source: http://www.engadget.com/2013/10/01/hp-elitebook-820-840-850-probook-640-650/
It was just two weeks ago that HP spat out a bunch of new consumer laptops ahead of the holiday shopping season. Now that those products are official, HP is shifting its attention to business customers: the company just unveiled five corporate-friendly notebooks, two of which qualify as Ultrabooks. Starting with the outfit's higher-end EliteBook line, we've got three models: the 12-inch 820, the 14-inch 840 and the 15-inch 850. Like previous generations of EliteBooks, they meet the military's MIL-SPEC-810G standards for ruggedness, but this time, they're 40 percent thinner and 28 percent lighter. Across the board, you're looking at magnesium lids, which have been painted with four coats of paint to minimize scratches; the keyboard deck, meanwhile, is made of aluminum. Speaking of the keyboard area, all three models sport backlit keys, with a special finish applied to the buttons to help keep them fresh over the three-year warranty period.
Interestingly, battery life is the same on all units (up to 12 hours), though the 14-incher, specifically, can be paired with an optional slice battery for a total of 33 hours of juice. On the inside, all of them run Haswell processors, as you'd imagine, though only the 840 and 850 meet Intel's Ultrabook specification. Once it comes time for your IT guy to configure this, he can get any of the three machines with an optional touchscreen, along with an LTE radio and either an SSD, HDD or hybrid hard drive. As for IT support, these are vPro CPUs, as you'd expect, and there's also TPM on board for added security. Additionally, as on previous models, the entire back shell is removable with a single latch, making it easy to swap out components. Finally, HP included an all-important Ethernet jack, complete with a drop-down jaw, along with a SmartCard reader, docking connector and legacy VGA port. All are available today with pricing as follows: the 12-inch 820 starts at $859, the 840 goes from $799 ($949 with a touchscreen), and the 850 costs $939.