It adopts TP4056 charging chip, which is of good quality. It has controllable step-down voltage stabilization. It has a charging indicator light. Ordinary 3mm lamp beads on the market can be used. It does not have overcharge and over-discharge protection circuits, because most batteries have protective plates. Repeat, the charging interface can be separated and placed at will, giving you more options when using your device!
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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.
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