I need help please

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Pocketable Fuel Gauges: pictures and howto [serious]

Pocketable Fuel Gauges, let me see what you’ve got. Discuss. Let’s see them and answer any questions about them. This is one way to check a board’s charge level. Other ways include experience, bluetooth/cell-phone, and ESC cutoffs. Oh, and of course building fuel gauges into the board itself. That’s so 2018.