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This 18650 lithium battery charging board comes in a pack of 10 units, adopting 5V Type-C USB interface for easy power input. It provides steady 1A charging current perfectly matched for 18650 lithium batteries. Integrated dual protection circuit safeguards against overcharging, overcurrent and short circuit, ensuring safe and stable charging process. Mini lightweight board design is easy for embedded installation, ideal for electronic DIY projects, small appliance power transformation and daily 18650 battery charging applications.