3pcs Lithium Battery Charger Board LED Dual USB 5V 2.4A Micro/Type-C USB Mobile Power Bank 18650 Charging Module Circuit ProtectionFashion

The module is a portable backup power supply with an input that matches the 5.0V adapter to charge the internal battery. Use built-in battery for portable device to provide 5.0V/3.0A USB2.0 supply output for external devices.

Button function: Press and hold the button after standby, the LED digital screen displays the power.

Charging cable: support three type of USB Cables for iPhone Lightning & for Android Type-C Micro USB

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Note: The positive pole of the battery is connected to B+ and the negative pole is connected to B-, do not reverse it. If it is reversed, it will burn out!

Dual output current: 5V 2.4A; Input voltage B+ to B-: 3.0 – 4.2V; Protection: overcharge protection, overdischarge protection, short circuit protection, constant current.