RedTagCanada Dual USB 5V 1A 2.1A SCM & DIY Kits Module Board Mobile Power Bank 18650 Battery Charger PCB Module Board PCB LCD Display for Arduino

• 【Convenient Charging Indication】The LCD screen conveniently displays the word 'IN' during the charging process, our 18650 charging board ensuring you have a visual confirmation of the battery status. 【Output Load Indication】Simply connect your device and long press the LED switch to initiate the output. The 18650 lithium battery charger board screen will display the word 'OUT' along with the output voltage/current, either 5V/1A or 5V/2.1A. Enjoy the convenience of knowing the exact power output. 【Comprehensive Protection】This dual USB charging module for power bank integrates a lithium battery protection circuit to prevent overcharging, overdischarging, and overloading. Safeguard your batteries and connected devices for worry-free charging. 【Easy Battery Connection】Connect the positive pole of the battery to B+ and the negative pole to B-. The module is designed for seamless battery integration, ensuring efficient power transfer. 【Versatile Battery Compatibility】This module can be used with a single lithium battery or multiple lithium batteries connected in parallel. However, ensure that the total capacity does not exceed 20W mAh and the voltage ranges between 3-4.2V.