I wigged out a little trying to figure out the charging. I was confused too by the firing button lighting up and supposedly shutting off near charge completion then the blinking light that was red and flashing green. I finally just left it alone until the light was fully green.
Hahah yeah it was really weird the first time seeing it keep changing from red to green so I just figured when the charger light was fully green then it must be good to go. Sadly I don't think I'll use this set up at work as I stock grocery and break down pallets and stuff for work and I feel like the tank might be too fragile to hang around in my pocket all day so my EVOD's will be used at work