Features: Experience seamlessly power on travel with the 18650 Battery Case, featuring not need welding design for efficient charging. This portable powerbank case supports 3pcs flat head 18650 batteries, offering digital display and mutiple protections for reliable performances. Suitable for enthusiasts and individuals with high charging demands, this DIY mobile power case allows for customizable battery capacity to suit your needs. Note:18650 batteries is not included in the package, you need to purchase separately. Can only use the 18650 battery of which positive electrode is flat top. Please pay attention to the direction of the positive and negative poles.Do not close the cover untill test it is finished, it can not be open again if closed. Specifications: Component:Plastic Number of batteries:3x18650 batteries Color:White Input Interfaces:USB/Type C/Linghthing; Type C Output:5V3A,9V2.2A,12V1.65A, USB Output:5V3A 9V2A 12V1.5A 10V2.25A Lingthing Output:5V2.4A Input:Type c:5V2A 9V2A 12V1.5A Package Includes: 1pc Case (Battery not include) note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.