My wife and I started with Smokeless Image Volt cig-sized...similar to the Halo G6 batteries. Frankly, I've been married 38 years because I don't tell her to do anything. "Yes dear"...is my normal utterance.
That being said, she was so impressed that I quit, being a 40 year heavy smoker, that she jumped right in with both feet. The smaller batts in colors and gem style endcaps helped keep her interested...accessorizing is the correct term, I believe.
My wife and I have moved on to larger batteries and
tanks, but I'm not sure my wife would have liked these in the beginning. Perhaps your spouse would be more comfortable with smaller batts and smaller
tanks, like the Smokeless Image or Halo batteries with the mini T4 style tanks.