3D Printer Files | 3MF File | 18650 Battery Spacer Grid | Octagonal (8-28 Cells)

This is the "Powerhouse" edition of my octagonal battery holder system. These 4-row wide grids are designed specifically for large-scale energy storage projects, such as home powerwalls, solar accumulators, or high-performance EV battery packs. Why use the 4-wide series?Assembly Speed: Instead of gluing dozens of smaller holders, use these large blocks to rapidly assemble huge battery arrays.Structural Integrity: A 4-wide block creates an incredibly solid core, keeping cells perfectly