portable power bank 3d model

A highly realistic 3D model of a standard portable power bank, focusing only on the exterior design, clean industrial product style. Dimensions: * 140mm length, 70mm width, 20mm height Shape: * Compact rectangular body * Smooth rounded edges (filleted corners) * Slim and minimal profile Exterior details: * Matte black plastic body with soft-touch finish * USB-A output port with metallic silver finish * Micro-USB input port * 4 small LED indicator lights on front (subtle soft green glow) * Side power button with dark grey rubber texture * Clean minimal design, no branding Materials and colors (realistic): * Body: matte black plastic * Ports: metallic silver * LED indicators: soft green * Button: dark grey matte Style: * Hard surface modeling * Clean topology (low to medium polygon) * CAD-friendly geometry * Real-world proportions * Smooth surfaces with subtle reflections Lighting and rendering: * Soft studio lighting * Isometric view * High clarity and sharp edges * Subtle s