Hey Folks, I have been playing around with My Kanger sub box mini,I have a 26650 mech mod that I was running a Efest 3500 battery with and after reading that it was not a true 32A/64A pulsed and it is really a 10 Amp at best I retired it....Then the battery in the Kanger died,so I tried the 26650 for fit....It worked! but the door no longer fit to hold it in,well a zip tie later the "MEGA" box is born!....I have been running it at 40 watts for over three days!...I would only get a day out of the old 18650 batt....Z