Kumiba, Xiaomi 10400mah Portable External USB Battery Charger / Power Bank for Xiaomi / Samsung / LG / Iphone / HTC / Google / Blackberry (rose) Built-in high capacity rechargeable 18650 battery, powerful with long operation time. High efficiency of power conversion,the USB output, more convenient. Electricity-saving functionLED battery indicator. Portable, practical and long cycle life. Safe and reliable, perfect for using on travelling and outdoor activities.