I’ve been carrying an OQO Model 01+ with a USB GPS around with me on airplanes, hiking, and cross-country skiing for over a year and if there is one thing that has been the single biggest problem, it is battery life. I have seen the same comment in reviews of the Sony Micro PC as well so I don’t think this is just an OQO issue. (Incidentally these devices are being referred to as UMPC Pro devices to distinguish them from consumer UMPC devices from ASUS, Samsung, and others.) Recently OQO released a larger battery which is designed to allow you to run your OQO for 6 hours. In my opinion battery life is usually defined by the marketing department so I took my OQO with a USB GPS (which uses the OQO’s power) and the larger battery on a 7 hr hike this weekend. I turned the OQO on at 9am and it automatically hibernated at 15:15. Very impressive.
I have heard from authoritative sources, that as components become less power hungry and battery technology improves, all day UMPCs will become the norm, which is something to look forward to.

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