The Oveready head also has fully customizable features, so you can reprogram it to perform different based on number of activations. This reprograming occurs using Oveready’s online app, where you make selections for brightness levels, strobe patterns, etc, and then create a programing video clip. They have you click your way into program mode on the flashlight, then hold it up to your computer monitor, where it “sees” the programing video and saves it to its internal memory. I thought they were crazy at first, but it definitely works - I have this one set up to be full-blast for the first 3 quick activations, followed by a 20% level on the 4th click in case I just wanted a task light. It allows you to set your secondary mode behind a number of quick taps to make sure you don’t accidentally engage it.
It uses a pair of IMR 16340 cell batteries to keep up with the power demands, which is rechargeable and puts out a peak 4.2 volts in the same body as a CR123. When operating at full brightness (30 watts, 3500 lumens), they advertise 9 minutes of straight run time. If you left it on that long I’m sure you’d need to be careful of the heat that’s being put out. If you run at around 1/3 power or 1300 lumens, they say it’ll last 24 minutes on a full charge. Here’s the manufacturer’s page on the head.