Funny, when I read the reply above on the thread I thought "This almost looks like a dutch forum". Guess I was half right
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TS: very clean job! Did you do this by hand or with soldering paste?
I have to agree with RetroTechie above concerning heat management. It can be used (and in fact it has been used multiple times), but keep in mind that you have limited heat dissipation. Do not try to use it on a single LED with 4xNiMH cells, it will not be able to get rid of the heat.
Potting it will help tremendously to improve the thermal pathway.
I do not agree with RetroTechie about the buck driver thought.
This 7135 based driver is for single cell use. It basically is just a current limiter with a PWM function.
Buck drivers are only for multi cell operation basically. Not to mention it is near impossible to find one with 4A driver current, multimode that changes modes by disconnecting and reconnecting the power with the tail switch and with a 17mm size. Believe me, I know
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