Features: Brand new and high quality Only the size of lipstick, plug and play charging, designed with a strap and charging cable, convenient to carry. Multi brand mobile phones and multiple devices are universal, supporting charging and playing at the same time. Supports 18650/21700/21650 rechargeable batteries. No welding, it can be used by directly installing the battery. (The shipment does not include batteries, only the shell) Suitable for travel/outdoor/home/school use, etc Compact and convenient to carry without taking up space. The positive and negative poles of the battery cannot be connected reversely, and board will be scrapped if connected reversely. After the battery is placed, use first. After the function test, it can be used normally, and then close the shell. Specifications: Material:ABS Color:White/Pink/Green/Black Size:Approx.77x36x26mm/3.03x1.41x1.02inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Power Bank Case