cross-reference: Under $10, 1x AA/ AAA/ 10440/ 14500 flashlight reference
This is called “#3” in the topic about AA/AAA lights under $10 — a good and growing compilation.
And if anyone knows a reliable source for these with solid pills — I’m looking.
They happen to perfectly accommodate the 10mm square boards that Luxeonstar sells with all colors of Rebel emitter — drop right in, wire holes are open, four corners of the square center the emitter in the round cutout — and the solid pill (the … one … damn … solid … pill) makes a great heat transfer backing for the board.