That looks like the same KD driver here so it should be pretty bright on a decent cell.
http://kaidomain.com/ProductDetails.aspx?ProductId=11372
Just bought two WF-502B's. Will let you know how they turn up if they arrive.
yes they can..i bought some batteries for a friend and put her address and they went to her..paid with my paypal account..
Make sure you get a confirmation email from Manafont and well as PayPal. The first time I ordered I didn't get one from Manafont. It turns out after you pay with PayPal you have to hit the button that says return to Manafont. Otherwise they don't know you paid and you won't get an email.
It does the same thing an aspheric does for any emitter. It focuses the beam and you get the pattern of the emitter. In this case it will be a large pattern. It cuts out all the spill so in most cases you probably aren't going to want to do this with a XM-L. I've tried it by the way.
The emitter angle for a XM-L is wider than with a XR-E for instance so a reflector does a decent job in the first place. Also people generally want the spill from an XM-L. It also won't throw as far in the same size reflector/aspheric as a XR-E so it's generally not the best choice for using an aspheric.
If you use a XM-L in a large diameter reflector it will have decent throw and will put a lot more light where you want it. That's generally why someone might chose a XM-L over a XR-E in a particular application.
Then I guess it's not direct drive.
It most likely is. Specs are arbitrary.
As I've prommised I've measured current with L2 drop-in which should be the same as the one on pictures above. It was just about 3A with flamed trustfire at 4.20V. Wellknown MF Ultrafire drop-in pulled 3.4A with same battery. I'll try to find out wether is direct drive or not later this evening.
If regulated current shoud stay the same some time or even rise, right?
I ordered a WF-502B, thanks for pointing this out!
Sounds like a plan, but gotta be strict with my spending.
I have SF L2 laying around with XR-E :P
MF claims that last one is the "original"/genuine Ultrafire, but I wonder if it is. By far the best made 502b I've seen and own (from KD) doesn't have a separate battery compartment but is instead "straight-through" (battery + contacts p60 drop-in center) like every other p60 host (you can tell from the metal "button" between the battery and p60 compartment in the photos, the battery can't go all the way through the host if the drop-in is removed). It would be a strange case of clone besting the original if MF is correct.
My 5 Mode XM-L drop-in of Kaidoamin and the driver looks identical pulls 2,83A on high (not full loaded Samsung 18650).
I am thinking it won't perform as well as the genuine? drop in. But it would still be nice flashlight for the price.
Just bought one, lol.
on both counts
and what is the cheapst way to get best throw from this host and XM-L light?any suggestions for head or reflector?
502B on the way, will post pics when it arrives 
I've measured currents on high with trustfire flame. L2 clone host was very hot. Drop-in was wrapped with alu foil. I kept it in a fridge between measurments. Made one mistake around 2.8A - for 5 min. It runt on mid mode. At the end when current went down to 0.15A @ aprox. 2.8V, driver switched to ultra low mode - 0.01 to 0.02A, so still puting out some light and not cut off entierly. The battery at that current starts to recover and went back up to about 3.0V. From now on quite a long runtime can be expected. Didn't wait to find out, but it might be another hour.
This is good feature when you are on bicycle or you don't have spare battery.
| Time (min) | Current (A) | Comment |
| 0 | 3,28 A | |
| 5 | 2,90 A | |
| 10 | 2,80 A | |
| 15 | 2,80 A | Running 5 min on mid.mode |
| 20 | 2,67 A | |
| 25 | 2,58 A | |
| 30 | 2,50 A | |
| 40 | 2,38 A | |
| 50 | 2,28 A | |
| 60 | 2,14 A | |
| 70 | 1,92 A | |
| 80 | 0,50 A | |
| 85 | 0,15 A | 2,8V drop to ultra low mode |
| ? | 0,01 A | another hour of runtime expected |
Just received my 502b.
Body: some minor anodising and machining imprefections. Threads acceptable, but nothing more (smoother than DD UF-2100 3 mode). Clip is nice and not too soft or firm.
Dropin - Some dirt or minor scratch on refletor, Led is not perfectle centered . Draws 2A on high and 0.08A on low with fresh TF flames.
Its no fenix, but for price of 15,50 it's OK.