Hello, I am new here. I plan on doing this review in steps, to make it a little easier on me.
I’ve been inspired by relic38’s Trust Fire AK-90 review. Go there for a better insight into this light, as they are apparently identical.
I will probably revise this review as time passes and my equipment and electronic skills improve (Waiting for a new scope/multimeter).
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| Brand | Sing Fire |
| Model | SF-210B |
| Color | Black |
| Color BIN | Neutral White |
| Switch | Tail, Nice green reverse clicky |
| Modes | Hi - Mid - Lo - Fast strobe - SOS |
| Battery | 3 unprotected or 4 protected or unprotected 26650 |
| Emitter type | Cree XM-L T6 |
| Lens | 3x83mm Glass |
| Reflector | Polished aluminum |
| Ordered on | 07.11.2013 |
| Received on | 21.11.2013 |
| Price paid | 95.50$ |
| Purchased from | Deal Extreme |
| Cells used in test | Protected Lustefire 5000mah Li-Ion 26650 |
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This flashlight is available in two colors, black: SF-210b and brown SF-210a .
Size compared to a D5 Mag Light
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I measured the current at the rear with Near Flat/Flat batteries:.
| 4 cells 26650: | ||
| High | 3.05a | 45w |
| Medium | 1.35a | 19.9w |
| Low | 0.36a | 5.3w |
| 3 cells 26650: | ||
| High | 1.72a | 18.92w |
| Medium | 0.58a | 5.28w |
| Low | 0.1a | 1.1w |
With protected batteries you cannot tighten the tail-cap in three battery mode.
I am unable to measure the voltage under load, but three cells in series puts out 11.00v with no load.
I’ll get my charger tomorrow… I will re measure when I get it and got the batteries recharged.
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How DOES one unscrew those pesky rings that hold everything together with just two small holes ?
Here is what I did:
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Underneath you can see how the spring is attached to the underside of the driver board using Enough solder.
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The driver board is marked as TR-0262, Rubicon brand capacitors. The three resistors in what I understand to be the sense part are R620 R620 and 1R5, with one spot free to do a resistor mod.
I notice the light reduces power consumption by regulating the frequency going to the leds, this is easy to see, I pointed it at a 120mm computer chassis fan, the fan “moves” normally in “High” mode, slows down in “Medium” mode and “Stops” in “Low” mode, indicating that the light is flashing slower and slower to reduce power consumption. The flashing is impossible to see with the naked eye though.
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So that’s what I got so far, it is a work in progress, the flashlight seems to be a virtually identical clone to the Trust Fire AK-90 , no beam shots yet, because I haven’t been able to charge my batteries. I am really looking forwards to modding this beauty.
New measurements… at high there is no frequency modification. on medium it’s getting it’s juice at 122.3 hz at low it’s at 77 hz, the strobe is at 8.16 hz…
Ps. How do I get the Tables to center ?