Get a Morpilot combo multitool and zoomie. The tool is pretty sturdy and handy, and the zoomie is probably the best-built (as in solid) small zoomie I’ve ever seen. A Cometa or Z1 would be nicer, but the former doesn’t exist anymore and the latter is more than you want to spend.
Anyway, the Morpilot zoomie takes 3×AAA in a holder, but a 21700 just drops right in. I leave mine on flood all the time, and it’s a nice smooth blanket of light which is perfect for indoors, lighting up the path in front of you, etc. And you still have the option to zoom it and see what’s making noise way out far.
Not very moddable, though, as it’s glued shut, but for an around-the-house light, it’s just about perfect, and the 21700 lasts a long time.
Hmm, just looked, the one I ordered isn’t available, but Amazon.com looks about the same. For 15bux…