Ecig. I have bought two of these drivers and used them in single led flashlights. They are both different. The first one I bought on high and low put out 5 and 4 amps. The second one I was alot happier with as it was on high 5 amps and med 2 amps. The memory works pretty much straight away on both. Another difference was one was high, low then medium and the other was high, mediun and then low. They both make a slight hum on medium and low. I have linked to the threads if your interested. The HD-2010 is still a work in progress. This driver is post 41. I like the HD-2010 driver a lot more than the one in the JM05. Drivers are a lottery. They both came from KD.