I'm currently using a Ameravape Manhattan copper clone with a Plume Vale clone and using a 18650 3.7v 2500mah battery. I have two of those batteries that I rotate regularly. Problem is one of them started to hit really weak. No throat hit, flavor, or good vapor production. So I tweaked with my mod mad sure pins where tight and everything is good and the other battery works fine. So I went to my local cape shop and they told me the battery must have gone bad. So I bought a new one. Problem now is the one that was working fine is now firing weak and the new one works fine. I don't understand what's wrong???? I'm running a .2 ohm cool if that helps. Any advice would be very helpful and much appreciated! Thanks in advance