I think you're way over thinking this thing. Go for simple. Buy a single AA battery light. There are many good lights out there with a single AA configuration. I've enjoyed Maratac and I really like Peaks. The reason I like one AA as opposed to 2,3, or 4 is because as a gift, the receiver of the gift will: be amazed at the brightness of the AA light by itself; usually be able to find a least one AA battery when they need to use the light; will be more likely to carry a single AA light with them in their pocket on a regular basis; and lastly, because I've found that multiple cell flashlights have more acid leaks than single cell lights.