Sep 10, 2019 · Note that many of the legitimately higher lm flashlights (at a much higher price too), that use 18650 batteries, usually use several (3 or 4) in parallel, meaning it really only needs 1 to run, but the higher wattage LED would cause it not last very long, so they parallel multiple batteries to still deliver the same approximately 3.7 volts, but ...
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