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  1. F

    Does a C-cell 3.7V booster exist?

    I am curious to know if a single C cell booster exists to boost a 1.5V alkaline C-cell battery's voltage to ~3.7 volts. I have seen several 3xAAA lights (I own one or two) which work well, but don't stay bright for very long. However, I noticed that I can fit a C-cell battery in the same space...
  2. F

    Runtime for a variable-input bulb

    I have a Dorcy 41-1642 PR LED bulb, which is currently placed in a 2-D flashlight. Here is a scan of the bulb's packaging, stating its output and current consumption for different voltages. I also have an equally suitable 3-D flashlight currently using a PR Krypton bulb. My question is, and...

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