I just got 2 Ego batteries and 2 Evods today. They were working great for a while but after I charged them, they stopped firing. After taking them off the charger, the battery would work fine. The buttons would light up and go in and out of sleep. But when I attached my Evod, it stopped working. The light would flash once and not work at all. It's doing this for both batteries and evods. It seems like it's shorting but I dont see why it would. I believe they are 1.8 and 2.2. The batteries I have now are Ego C. My older ego works fine with them. I am also getting a chemical like taste from them too.