กล่องแบตเตอรี่ลิเธียม 12V พร้อมวงจรบาลานซ์ 40A 80A BMS 3S สำหรับประกอบเอง ใช้กับจักรยานไฟฟ้า ใส่แบตเตอรี่ 18650

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