Ouch, that mistake made me feel foolish. And because the driver was such a tight fit(even had to sand it down quite a bit), I can't remove it from the heatsink now. I think this light will have to remain a 1-mode until I get a hold of something thin and solid that can poke the driver out through the holes where the wire goes to the LED.
You might want to change your graphic or delete it so someone doesn't get the wrong idea. It's true that the negative connection is the pad on the upper left next to the 7135.
guys, I have lost the C1 on my 105C, probably got ripped away while modding lights:( does it affect something? do I need to replace it (if yes, with what capacity)?
It's just a buffer cap for suppressing noise on the MCU's voltage supply. These caps are usually in the 10nF - 100nF range. The driver will probably work without it, but you might see some random erratic behaviour.
I don't think they make the 105A or 105B any more, I think it is 105C only now. I believe it is like a revision letter. I hope the 105D comes out soon I have been getting some bad 105Cs lately.
I've bought the $4.70 one several times. It is a good board with different mode groups available. The more expensive one (from the pictures) doesn't seem to have a microcontroller, so it *should* be a 1-mode 2.8A board (one of the reviews indicates it has modes, so either they are shipping something different or the review is for the wrong product). The second one may have a 2011 date, but the reviews go back to 2009.
I bought a few 5 packs (alot cheaper) and worked fine. I managed to kill one of the amc to get 350mA less draw for a comission speciality flashlight and the owner was happy for the added runtime and less heat and not much less output. At least not easily percieved drop in brightness.