AOICRIE Dual USB 18650 Battery Charger Protection Module 4pcs, Power Bank PCB Module Board, Dual USB 5V 1A 2.1A

• UPC   701715447554
• It is possible to connect only one lithium battery or multiple lithium batteries in parallel. The capacity of connected battery is no more than 200,000 mA, As long as the battery with a voltage of 3.0-4.2V can be used. The word "IN" will be shown in the display. Output indication: Long press the LED button after turning on the load, Start output, The word "OUT" and the current and voltage of 5.0V1.0A or 5.0V2.1A will be displayed in the display. LED indicator and LCD display: When charging, the display will show IN letters. after the load is connected, long press the LED light button to start the output, and the display will show OUT letters and the relative output voltage and current 5V1A or 5V2.1A. The protection circuit of the boosted lithium battery has been integrated, prevent over-discharge, over-charge, overload short circuit protection, over current protection, and over temperature protection. 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!!!!