It's been awhile since I found those upgrades for $5 at Target. They were the 1 watt module with IQ switch combos. I like the led module, but don't care for the IQ switch. There have been numerous threads in which the IQ switch gets criticized for a number of reasons. Many feel the switch sucks too much power, in reality, maybe +/-10% reduction in output. I don't care for the red blinking light feature. Plus, as I have said many times, the light is only useful to me on high power since it isn't crazy bright in the first place. I reinstalled the original minimag tailcap, and simply turn the light on and off by twisting the head. BTW- before you spend another dime on Nite-ize product, Lowe's will sell the genuine minimag-led 2AA and 3AA for $11 each on "black Friday".