I bought 4 ego bats from fasttech, they all worked ok but suddenly 2 of them can't take a charge and don't fire, I've tried with evods, t3, ce4 and 2 of the ce4 types that came with the kit (I've already tried everyone of these in other batteries and work great). I've already checked them with a volt meter and seem to be giving 3.5 volts and the led button does light when fired they just can't make a connection and I'm not sure how to fix them.
any ideas?
any ideas?