I bought two of these :
DZ88 New 400LM 18650 CREE Q5 LED Black Flashlight Torch White Light 5-Mode Black | eBay
And when I took them out on a night ride, I noticed that they flickered with every bump in the road and randomly dimmed in intensity. At first I thought the batteries weren't charged, but I later noticed they increased in intensity after going over a bump, and then randomly dropped back down again.
I already know they're garbage, I'm gonna go broke at some point and get a cygolite expillion some hundred at some point in the future, I just wanted to post here so that, in the very slim chance I'm missing some easy fix, someone would mention it. I'm pretty sure they're just lousy lights and I once again got caught trying to take the cheap way out.
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