D cells are pretty much paperweights to me. When digging thru some boxes last summer I found an old 3 x D-cell Mag-Lite I bought back when they were the SOTA (in other words, somewhere around when I graduated HS...1987). It hadn't been used in a decade and a half at least but I decided to see if it still worked. When I looked for batteries I was stunned to see how expensive D's had become. Now, I had no intention of dropping $9 on Energizers when I didn't even know if the light would even work! Eventually I found some off brand alkaline D's at Big Lots.

BTW, the light worked...but it still sucked! Even my cheapest $7 Chinese LED was brighter with better throw and more usable spot.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman