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HP DM4 power pack
In some regards, mainly the battery life and thinner chassis, the Envy would clearly be the preferable choice, but is it £500 better? No way. In fact, in some ways, the cheaper of the two is actually the better specced: it has more RAM, can accommodate even more RAM and comes with discrete AMD graphics, rather than relying on the Intel HD integrated chipset.
The most compelling reason to choose the ultrabook over its laptop rival was the size of the power pack, as the one that came with the DM4 (pictured) is plain ridiculous for a 14-inch laptop, but how likely is not buying a laptop on the basis that the power pack is a ludicrous size?
Image credit: Ben Woods