I just got my first titan batteries today. One of them won't charge at all. Tried it on 2 different chargers that are Vapor4Life chargers. The other one charged but it very difficult to use. I have to make at least 4 primer puffs to get it to even think about working and I have to suck in on it twice as hard. It is a lot of work to use and very little enjoyment. I was excited to get the new sealed batteries, but now I'm not so sure.