Descriptions:- Specially designed for Xiaomi 5, enjoys entertainment with hiding holder- Polymer lithium battery, powers your phone standby- Great material to protect your phone, charging and protecting 2 in 1- Efficient and safe charging- The battery has passed the MSDS ( Material Safety Data Sheet )Specifications:- Input: DC 5V 1.8A- Output: DC 5V 1.8A- Charging time: 4 hoursTips:- Attach the battery case to your phone, and then press the power button, the battery case will begin charging your phone- When charging the battery case with the phone attached, the phone battery will be charged first. After the phone battery is fully charged, charging of the battery case will begin- When charging the battery case with phone attached, data transfer is supported Battery Capacity: 4001mAh-5000mAh 0.148 Package weight: 0.179 kg Product Size(L x W x H): 15.50 x 7.30 x 1.60 cm / 6.1 x 2.87 x 0.63 inches Package Size(L x W x H): 21.10 x 10.40 x 2.10 cm / 8.31 x 4.09 x 0.83 inches Package Contents: 1 x Backup Battery Power Bank Charger Case