Top positive review
138 people found this helpful
My favorite LED flashlight
on June 25, 2011
I own several different kinds of LED flashlight, and this is my favorite model. It will work with either one 3.7V 18650 battery or two 3V CR123A batteries. My WF-501B is a 900 lumen model. To select through the modes, just tap the clickie button at the back; don't push it all the way in. It took me a while to get that figured out.
The beam from this flashlight doesn't have an annoying tight spot with a wide, more dimly lit peripheral area. The bright part is bigger, so you can see more of what you're looking at better. That's the main reason that I like this flashlight better than the others I've tried.
The only (mild) complaint that I have about this flashlight is that the end cap, which you remove to replace the battery, isn't smartly milled in the screw-on threads. As the result, you have to push against the spring while aligning the cap by eye, and it can be a little difficult to get the cap back on. If you want to see an end cap that has much better-milled threads, check out the Romisen RC-B12. That's not a major issue though.
Using one recently charged 18650 battery (UltraFire 3.7V 3000mAh), the beam from the flashlight (on the brightest mode) will stay very bright for about 90 minutes, after which there will be a slow decline in brightness over the next five hours or so. At the end of the 6.5 hours, the battery will probably be about pooped out, with a voltage under load of about 3.0V. So even if you use the bright mode continually, you should get enough light to see your immediate surroundings (at least) for maybe five or six hours.
Of course, to save on battery power, you should use the low intensity beam most of the time. I haven't tested, yet, how long the battery will last if you use only the low intensity beam.
Added 10 February 2012. Since this review first appeared, I have found other flashlights that I like better than this one. I still like the Ultrafire 501b, but these are even better (in my opinion):
Trustfire Z3 with zoomie lens.
Keygos pro-series Z16 with zoomie lens.
All of these flashlights have the 5-mode XML T6 LED, although the Romisen RC-E4 had to be upgraded with it. All of them use 18650 li-ion batteries, one each, except for the Keygos, which uses two.
And my EveryDay Carry (EDC) flashlight is an UltraOK VS-O5 with a three-mode Q5 LED.