Ultra-Slim and portable power bank with LED Indicator Compatible Type -Universal Battery Type- Li-polymer battery Built-in Battery Model N/A Voltage 5V Capacity Range 2001mAh~3000mAh Nominal Capacity 2600mAh Input 5V / 1A Output 5V / 1A Features Other Features Designed with hidden micro USB cable (4cm) and power indicator. Dimensions  3.82 in x 2.48 in x 0.28 in (9.7 cm x 6.3 cm x 0.7 cm) Weight  1.9 oz (54 g) Packing List 1 x Power bank