Professional 3-tier modular battery holder system designed specifically for 18650 lithium-ion cells, custom power banks, and DIY energy storage projects. This complete set includes bottom, middle, and top interlocking plates to securely lock and align cells at both ends and the center.​Engineered with precise tolerances to ensure a snug fit for standard 18650 batteries while keeping terminals accessible for spot welding, wiring, and BMS installation. Ideal for makers, electronics hobbyists, and DIY power wall builders.​Key Features:​Complete 3-Tier Set: Includes bottom base plate, middle spacing frame, and top securing plate.​Secure Alignment: Holds cells firmly in place, preventing shifting or loose connections.​Optimized Clearance: Designed for standard 18650 dimensions with proper spacing for airflow and wiring.​Modular & Scalable: Perfect for building custom power banks, e-bike auxiliary packs, or workshop battery banks.​Printing Recommendations:​Layer Height: 0.2 mm​Infill: 20–25% (Grid or Gyroid for structural rigidity)​Supports: Not required (optimized orientation for direct printing)​Material: PLA, PETG, or ABS