Found out it comes with a battery, so will just go with that for a start before dropping anymore money into it.
Not gun related, but eye protection. I have always had issues with goggles and glasses. No problem with fit, but fogging up is a problem. Used dual pane, single pain, tried all sorts of things on my glasses as well as the goggles themselves. I saw an add for goggles with a mini fan in the top. Does this actually work? Anyone with glasses wear this? Do they keep both from fogging up?