Light, compact and bright.
Been in low use and now, a year and a half after buying, I dug up for use and the solar panel doesn’t want to be charged in any way. The lamp has been inside against the windowpane for two days and now on the balcony in direct sunlight for four hours and still only one light comes on on the current meter. Edit: Now the second of the four light has appeared, after another four hours in direct sunlight.
There really isn't any solar cell charger in the phone, the power of the cell is just enough to use the lamp during the summer. As a backup power source, you get the phone for about 60% once, and then use the lamp very sparingly so that you don't run out of power.
Practical and light. Slowly charges to full, dropping the fifth star away.