The best USB Battery LED lamp

Of all the previously used by me USB lamps this is the best and, above all, the most flexible. Because this lamp can be connected not only via USB to the notebook, but also use per battery. Is located on the battery holder a holding clamp in order to clamp such as a book and a magnetic clip to attach otherwise the lamp to addition. Last but not least the lamp unlike most USB lights has a power switch; they must not pull out whenever you do not need more light so.

Negative points there's for me no.

Highly Recommended!