1.5V~4.2V 3W Cree Circuit Board for Flashlights (16.7mm*5.6mm)

Pros: I am using this for a 2AA light. It has fantastic efficiency for a boost converter (89%). Most of the cheap boost converters on DX are only 60-70% efficient. The benefits of the higher efficiency are many - cooler running, longer runtime, and less heat stress on the battery and LED.

Cons: DX says it's 3W, however I'm only measuring an LED output of about 1.5W.

Other: This is the best, most efficient driver on DX for 2AAA or 2AA applications where you only need 1.5W and only one mode (on/off).

Pros: Bought two of these (at December 2009 and February 2010) and have modified two unnamed 1W flashlights. One of them now has Cree P4 (sku.3475) and another - Seoul P4 (sku.1445). Both flashlights are now much brighter and both consume 1.35A from fresh AA NiMH (2x1.41V). I haven't measured current on leds but they are at least twice brighter than with original 350mA drivers.

Cons: none

Other: Excellent bust driver for 2xAA flashlights, can't find better on DX for 3W SSC or Cree led. Ideal for replacing old Luxeons with new Cree/SSC.

Pros: I used to use SKU7882 and a Q5 LED to upgrade Romisen RC-G2s but I thought I would give this a try as it is cheaper. Using this circuit board with a NiMh battery the performance is roughly similar to standard but with a 14500 battery the output is substansially greater. The Romisen becomes a pocket rocket.

Cons: Would be nice if there was a 16mm version available other than that I can't think of any cons.

Other: Excellent upgrade for AA sized torches as it allows the use of either type of battery and cheaper than the alternative SKU7882.

Pros: Works great even with single AA or AAA nimh (less than 1.5v)!
On the same single worn out battery, 25505+Cree Q2 is far brighter than the 08988 1xAA flashlight I bought at the same time.
Easy to use since there are no modes, it's worth its price.

Cons: None

Other: A 4 or 5 pack would be great.
Info on tweaking its power output would be great too...

Pros: - Efficacy of ~85%
- Easy to install and use with pre-soldered wires for the LED
- Good components used in its construction
- Well built, no sloppy soldering encountered yet
- Each unit came individually packaged in red bubble wrap

Cons: - No cons except maybe that the pre-soldered wires is a bit thin.

Other: My new go to LED driver for single li-ion or dual eneloops.

Pros: You can get higher current buy resoldering R150 resistor to R100 (0.1 Ohm). To get more stable output add 10mF solid capacitor to both tantalum on-board (total 2 of 20 mF). I have done all above to drive Cree XP-G and get a small pocket sun 8-)

Cons: Nothing to say. All is quality.

Other: Buy it! Seriously))

Pros: The driver works even from 1 volt (I'm not sure how much current it can produce from 1v, because I needed only 0.2A) and is very small.

Cons: None. I gave 4 stars to build quality because name of IC was roughly erased.

Other: It's a good driver if you want to repair/make LED flashlight that is powered from 1.2 - 3v (1 or 2 AAs or AAAs) with regulated current. All you need to do is to replace the R150 resistor with another one. You can calc the needed resistance by the following formula: R = 0.09/I Where I is the desired LED current in amps and R is the needed resistor in ohms.

Pros: You can get higher current buy resoldering R150 resistor to R100 (0.1 Ohm). To get more stable output add 10mF solid capacitor to both tantalum on-board (total 2 of 20 mF). I have done all above to drive Cree XP-G and get a small pocket sun 8-)

Cons: No cons except maybe that the pre-soldered wires is a bit thin.

Other: A 4 or 5 pack would be great. Info on tweaking its power output would be great too...

Pros: Just one that says all: Works as expected.

Cons: Wires could be more thick, that would improve efficiency a little.

Other: Bought two of those, but one was defective (didn't want to bother customer support with $2 unit, so I just threw it to electronics waste disposal - didnt count it for the rating). My WF-606A shines nearly as brightly as with original driver and gets 1A insteaf of 1,8 from 2 Eneloops.

Pros: This is a Compact and very bright little driver, when pared to my P4. It is a lot brighter than another, more powerful drivers I bought at the same time (suk21106484). It has only 1 mode, so very easy to operate and there is no messing about with flashing or sos modes. The min Vin is suitable for use with 2 ni-cad/ni-mh cells, so ideal for small torch conversions

Cons: The leads are a little thin and short, but this is only a minor problem. i am the wallrus.

Other: Good, simple to use little driver for 2 cell alkali or ni-mh applications. So far, I'd recommend this unit.