Features: Adopting an innovative detachable battery compartment structure, equipped with patented buckles or magnetic interfaces, 21700 batteries can be replaced within 3 seconds without the need for tools. Equipped with Type-C+MicroUSB double input/PD+QC3.0 double fast charging output solution, built-in intelligent temperature control chip and triple protections for overvoltages/overcurrent/short circuit. The battery compartment is fire-resistant and flame-retardant PC, and the battery contact points have anti reverse design, suitable for protective plates and 21700 batteries. Provide standard set (including main casing, circuit board, battery compartment, silicone plug), supporting users to independently choose battery brand/capacity. Perfect for emergencies, drones operations, international trips, and activity; for air travel with 5-20V global voltages adaptability. Embraces sustainable extend battery utilization by 300%, replace only aging cells while reusing the shell for 10+ years, reducing e waste and aligning with regulations. Specifications: Component:ABS Applicable battery: 21700 battery (battery not included) Type C input:20W Type C output:22.5W Color:1,Silver Size:Approx.90mm/3.54''x53mm/2.09''x25mm/0.98'' Package Includes: 1Piece Battery Chargers Case note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.