18650 is too thick but side by side AA is better? A single 18650 light is still slimmer than a side by side AA/14500 light. After adding in the driver, reflector, e-switch or clicky or whatever, tail cap, and lens. A small 18650 is still a better light than a side by side aa/14500. Of course unless you are just looking at it from a easy to get battery when you’re out camping type thing then any aa will be easier to get than a 18650. But your assumption that an 18650 light is too thick to carry in your pocket is just not right. As you can see two 14500’s are wider than an entire 18650 light. Not to mention you go on to say a side by side aa would be hefty enough. So your looking for something not thick but still hefty. I had a wife like that many years ago.
