Okay so I have three 510 atomizers and two 901 attys and just today all of a sudden all five of them started dropping in vapor. I mean these things used to chuck out the vapor like crazy and they all started producing less at the same time which is really weird to me. To get a decent cloud of vapor I have to pull on it really hard. I'm not using carts btw. Could this be my batteries? Maybe there was a surge while charging them or something? Help?