Very pleasant is the charging function via the USB port. The charging function is battery-technically not perfect because all are loaded together, but in everyday life, the lamp is repeatedly charged without first having to search fix charger or new batteries. To refresh the batteries just come from time to time "real" in a charger.
In all a nice machine for the city. I think the higher price as opposed to the cheap LED lamps therefore justified. Why one star less? A slightly more sophisticated charging function would be nice, but maybe not in the price range ...