Just got a couple of cheap ones I saw on Amazon for $8 for the pair. Seems kind of interesting.
They're working pretty well although I'm not sure exactly what the translucent bands are for. They look like gaskets. The instruction sheet doesn't say much about their performance - especially not expected runtime. They can apparently take an equivalent Li-ion cell, but I'm only planning on using LSD AAs or perhaps alkaline in a pinch. They have an interesting focus mechanism with that bulbous lens and where it just slides/rotates freely. The instructions are too clear on how to access the three modes (high/low/flashing) other than pressing the button switch on/off. I found that once it's on I can cycle through the modes by just partially pressing down on the end button to go to the next mode. The instruction sheet is filled with awkward grammar and some clear mistakes, but I rather expect the with many items produced in Asia. Hiring native English speakers to proofread can cost a bit.
They don't produce any appreciable side light. I sometimes carry around an old bike light, and that deliberately has some side leakage in order to improve side visibility to oncoming traffic. But the bulb-shaped lens may throw out a little bit of side light.
They're working pretty well although I'm not sure exactly what the translucent bands are for. They look like gaskets. The instruction sheet doesn't say much about their performance - especially not expected runtime. They can apparently take an equivalent Li-ion cell, but I'm only planning on using LSD AAs or perhaps alkaline in a pinch. They have an interesting focus mechanism with that bulbous lens and where it just slides/rotates freely. The instructions are too clear on how to access the three modes (high/low/flashing) other than pressing the button switch on/off. I found that once it's on I can cycle through the modes by just partially pressing down on the end button to go to the next mode. The instruction sheet is filled with awkward grammar and some clear mistakes, but I rather expect the with many items produced in Asia. Hiring native English speakers to proofread can cost a bit.
They don't produce any appreciable side light. I sometimes carry around an old bike light, and that deliberately has some side leakage in order to improve side visibility to oncoming traffic. But the bulb-shaped lens may throw out a little bit of side light.