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It depends on the power expectations and circuit design of the microphone. Some phone lavalier mics use a LR44 battery. Maybe yours does, too. The LR44 battery, for example, has a nominal voltage of 1.5V and 105 mAh. USB has 5V and 3A (USB-C). That's a lot more power than a device using a LR44 battery would expect. If you wired it up directly, you'd probably ...


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