BrodyW

So I recently bought an eTech III 900amh (I know it's not top of the line but it was on sale), and I am using an AeroTank atomizer. When the battery life is at 100% (4 bars) it vapes pretty good, but then as soon as the battery life falls to 75%- (3 bars) there is a serious lack in power and vape. The atomizer is 2ohms and I have the voltage on the battery varying from 3.7 - 4.2. The liquid I'm using is 80/20VG. At times I would even switch the atomizer to a Vapage battery and it works great so I have narrowed it down to it has to be the battery.