Features: Elevates your power experience with our 18650 Battery Holder, a detachable Power Sources Case featuring PD QC3.0 and USB C for quick charging, ensuring your devices stay charging on travel. This DIY Power Sources Shell is for convenience and efficiency, boasting LCD display for power monitoring, antireverse connection protections, and compatibility with flat head 18650 batteries,no soldering required. Suitable for enthusiasts and frequent travelers, this power sources case caters to anyone in need of reliable, high capacity charging solution for their electronic devices. Tip:18650 batteries are 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. Specifications: Component:Plastic Size:Approx.166x59x43.5mm/6.54x2.32x1.71in Number of batteries: 8x18650 batteries Color:Black,Orange;(Optional) Output power: 22.5W OUT1 output: 5V/3.1A, 9V/2.5A, 12V/1.87A (supports 5V charging and discharging at the same time); OUT2 output: 5V/4.5A , 9V/2.5A, 12V/1.87A (multiports simultaneous output only 5V); IN input (USB): 5V/3A, 9V/2A, 12V/1.5A; Type C output: 5V/3.7A, 9V/2.22A, 12V/1.67A (only supports PD protocol for output); Type C input: 5V/3A, 9V/2A, 12V/1.5A; Other functions: Long press to turn on the LED light; Install reverse without burning the motherboards. Battery requirements: Flat head unprotected 18650 battery (65MM long), internal resistance within 50milliohms, discharge above1C; Fast charging have highly power, and using disassembled batteries can affect the user experience. 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.