Wed Oct 09, 2013 8:59 am
An update from my post back in February: I posted that it was a little slow to darken the first use each time I got it out. after using it a few times, it no longer exhibits that problem. I have never taken one apart, but I suspect it has some rechargeable cells in it that are charged by the light from the arc. The earlier auto helmets had some button batteries that had to be replaced occasionally, but the newer ones apparently do not.