Refers to 2200lm Version: The battery compartment is too large for the supplied adapter to take 3x AAA. He has almost 5mm play to the edge and rattles in the housing. Had the noise even under "introduce yourself to not so" to be recorded, this loose construction makes sure that the Spring loaded pin, which should reach to the upper side, the actual contact-coil spring in the housing, constantly loses contact The lamp just goes out , Enclosed is a transparent tube that I have (from the absence of instructions enclosed) as a solution to this problem viewed ... unfortunately it does not fit on the adapter ... some research shows that it is well for a special battery, the may also be used. Which would be, I was then too much search work ... At least Faltblättchen, it's ok to settle ... or of me from a reference to a PDF or ... whatever. When I noticed that the sealing ring of the lens had come loose when adjusting the focus and now hung halfway over the LED, I grabbed this pile electrical again and printed the return labels from me.