5V~12V 9W 3*Cree 3-Mode Circuit Board for Flashlights (16.7mm*5.6mm)

Pros: This is a wonderful boost circuit to drive three LED's from a 7.2V source (6 Nixx or 2 Li-ion). It has three modes: high, low, and fast strobe. Low mode current is about 25% of the high mode current, and it doesn't flicker. Strobe is very fast, I'm guessing 4 to 5 flashes per second. It has good efficiency for a boost circuit. Here are my measurements on high: Vin=7.1V Iin=1.6A Vout=11.2V Iout=0.84A Efficiency=83%

Cons: It's taller than most drivers, but you can move the boards together. I squeezed it down to 11mm height. Mine arrived with a portion of the inductor top cracked off, but it works just fine.

Other: This is the driver to get for your 3-LED projects powered by 7.2V batteries!

Pros: This driver has wide range voltage for you from 5v to 12v power supply.
Has 3 different modes are High, Low and Strobe.
Works great for 3 Cree emitters from P4 to Q5 for series connection, bright enough light output on high mode, good decent light output on low mode.
I have connect this driver with 3 used cree emitter from flashlight for decoration project from 2 pc. 18650 power souce.
Buy 3 at once even for lower price.

Cons: The strobe mode that I didn't care about much.
Brought 3 of this driver, the first driver use it about a month became defect, lost the high mode.
A little hot on the top smallest part.
Didn't has memory function. Will change to next mode when you switch on again. ( When you switch off at high mode, next turn on will be at low mode. )

Other: Good decent driver for 3 emitter up to 12v power.

Pros: not to many modes, does what it claims the flicker on low mode is not bad compared to some drivers

Cons: probably very inefficient, gets very hot (burnt through insulation tape) probably needs heatsinking. now dead.

Other: if you just need a driver that works and don't much care for efficiency get this, make sure you heat-sink it somehow