วิธีการทำ UPS แบตสำรองไฟ 12V power bank 12V 3S 18650 Battery Pack BMS Lithium Battery Protection

18650 3.7v lithium battery : https://goo.gl/jwwEHm
12.6V 1A Power Supply Adapter : https://goo.gl/jFfw3R
3S 20A Lithium Battery 18650 : https://goo.gl/dh8zyg
18650 battery holder : https://goo.gl/R1x6PH
12V DC plug Male & Female : https://goo.gl/tgwprh
Battery Indicator Display : https://goo.gl/zbqZT5
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