A rechargeable lamp, built from 4 USB components. A lamp, a switch, a 2-cell power bank (with salvaged cells), a wall plug , 2 cables, 2 hairbands.  Pretty inconvenient, but I like the modularity and color scheme.

(Interesting how USB became the standard for delivering DC power. Good riddance, proprietary power plugs. I fear the day they implement DRM in USB power delivery, and you can't charge your phone without special Company X iElectricity® ($99.99).)

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