kilian_kte Thatvery much depends on the available sunshine.. The stated maximum output specifications of 12W with 6V seem for me only achievable in some cloudless desert at the equator, i only tested in north eu... Thatvery much depends on the available sunshine.. The stated maximum output specifications of 12W with 6V seem for me only achievable in some cloudless desert at the equator, i only tested in north european late summer and fall sunshine and approximately didn't even reached the half of that. That being said, it is a very compact product with a sufficiently long USB cable and works quite nicely to charge something small like a LED Lamp or Moskito Killer UV Lamp. It also starts actually giving output with surprisingly minimal light and without direct sunshine needed! The output will be tiny by then, but it was enough to charge single or double 18360 batteries slowly but steadily. See More