Dual Battery DNAs

After reading AeroDan's scary review of the new vapor flask, I have been thinking about gutting one and replacing it with a DNA. Haven't really been able to find much information about dual battery DNAs beyond the DNA 75C/250C. Can a DNA 60 or 40 be used with a dual battery configuration? I assume the batteries would be in parallel to keep the voltage at single battery levels…

Any incite would be…

Dual Battery DNAs

Original source: https://www.e-cigarette-forum.com/threads/dual-battery-dnas.968331/