Features: Experience the convenience of no welding design with our 21700 Power Banks Case, featuring PD super fast charging protocol to power up your devices in no time. This plastic case accommodates 4x21700 batteries, ensuring amples power reserves while its builts in safety circuitry provides overcharge and discharge protect. Suitable for enthusiasts and DIYers, this power banks case empowers you to assemble your own portable power case without any soldering skills required. Whether you're traveling, camping, or on the go, this lightweight case keeps your mobile phones and devices charging and ready to use. Tip:21700 batteries are not included in the package, you need to purchase separately. Specifications: Material:Plastic Number of batteries: 4x21700 batteries Color:Black,Orange;(Optional) Output power: 22.5W (most 27W) USB output: 5V/4.5A, 9V/2.5A, 12V/1.87A (multiple port simultaneous output only have 5V); Input: 5V/2A; Type C output: 5V/3.10A, 9V/2.22A, 12V/1.67A (output only available with PD protocol support); Type C input: 5V/3A, 9V/2A, 12V/1.5A (simultaneous input not supported); 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.