I wrote the web address (
www.skd88.com) into my browser, and a bunch of Chinese characters came in. After google translate it seems they manufacture battery chargers.
I hope this helps, but I think it is kinda hopeless. It is almost impossible to identify these far east components, as getting the datasheet is impossible, and often it is in one language, and they want you to order a million pieces directly from the manufacturer. Not like 1 from farnell.
BTW the soldering is awful on that thing. I wonder who came up with the idea to make a big blob of solder on the pins of the ICs. Look at Q1. We know how a SO8 mosfet looks like inside, but this is cruel.