• Zak@lemmy.worldM
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    1 year ago

    The easy solution is for flashlights to be a few millimeters longer and flexible about the cells they accept. That’s true of the H150, as an example; it accepts all 14500s, or would if not for the RPP short.

    • jerv@lemmy.world
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      1 year ago

      Not wrong, but “a few millimeters” means a lot more for a 14500 light than for an 18650/21700 light. While many may think the ~8mm difference in length between the D4V2 and D4K isn’t much, it’s enough for some folks (myself included) to sacrifice the runtime.

      More importantly, it’s harder to accommodate a wider range of lengths without getting some rattle on shorter cells. Not an insurmountable problem, but definitely a consideration. The range required to take protected/USB-charging cells is a bit wider; >10% of the cell length, and a much larger percentage of the travel length of the spring. Dual-spring helps by splitting that across two springs, but has limits.