the other one 'sort' of works...but is much harder to draw on and cuts out far too easily
I'm having the same thing with some of my batteries and one in particular. I have several batteries and atomisers and keep alternating them, so it's not as if I'm wearing them out very quickly by using just one. Got them about 3 weeks ago. Mine's a white Evo with the Genie batteries.
They were great at first, but it now seems to be an on/off thing with them. They might work fine for a while, then become quite hard to draw on and giving out very little vapour and feels at times as if I'm sucking out just air even though the cart is full of liquid. I put them away for a while and then they seem OK again.
Also, I find the atomisers get quite hot quite quickly, but that might be because I like to vape puffs quickly one after the other, or it might be because I keep trying to get something out of it at the times nothing comes out it and it's getting temperamental. Not all of the batteries are like that, maybe just a couple. It's not the security cut-off thing either.
On the whole, the EVO batteries still last me
ages before they need recharging. I just feel there's a significant drop in performance with some (not all) of them. I was beginning to think it was just me being a newbie to e-cigs and maybe not knowing how to use them properly, although I have been draining the atomisers and cleaning the threads of the batteries and so on.
I've also got a couple of DSE901s, one with a USB passthrough. Initially, I preferred the EVO, especially the way the battery lasts and charges up so fast especially with a USB charger (till I got the USB passthrough for the 901
). But now I'm finding the 901 easier to draw on and with more vapour. That kind of saddens me as I really like the EVO!