I remember reading that, or maybe hearing it on a youtube review.
just wanted to add: this was the first mod that I won here on ECF (thanks Innokin), my first external batt mod, and the beginning of my transition from eGo batt's. It is also the only, well not only really, but it is 1 of 2, mods that I bought another after the first one wouldn't work anymore. On the first mini, the button would occasionally not work, or it would auto fire. Contact cleaner spray helped somewhat, but not very much. The switch contacts weren't dirty, just worn down I guess. The other mod that I replaced with an identical one is a Pico 75W, that one died just by my own carelessness..