We bought a rechargeable lamp a few weeks back. That is useful when a typhoon would cause power outage. We have an old one so we bought another for a backup. After plugging in the socket for 1 day, it’s running good with the white light for 4 hours. That’s pretty good. But when I tested the solar charger, hmm, it’s not charging at all. I left it under the sun for 3 hours and when I turned it on, the power lasted for just a few seconds. Clearly, that solar charging function is fake.