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Replying to @TreasureDev

Basically the conversion isn’t 100% efficient; some power inevitably gets wasted. If you need 10 mA @ 3.3V, you might have to pull 11 mA from your 3V battery. The green line shows how efficient the conversion is at 10 mA current draw; it’s saying that it’s less efficient at 3.7V.

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