| http://www.w3.org/ns/prov#value | - This is not a problem when I am close to an outlet because I can simply plug in the devices, but sometimes that is not an option such as if am at a meeting or CLE out of the office with no easy access to an outlet, or if I am traveling. (Airports are getting better about providing power outlets for travelers, but it is not always easy to get a seat close to one.) I used to use small external batte
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