Also as for batteries, Evolv recommends only to use high drain / imr batteries. batteries have to be capable of at least a 5amp discharge. As far as i know, protected batteries are generally around the 3amp range for discharge. If the protection circuit fails in one of those it could be bad news. AW imr's have a 5amp discharge rate where the panasonic cgr18650ch batteries have a 10amp discharge rate. I recommend the panasonics.
In that case I'll stop using the Protected batteries. Thanks for the tip matador!