🔋 21700 + 18650 Battery Salvage Jig — Dual Cell Spot Weld Remover for Tesla Pack Recovery & Ebike Harvest (Dremel / Rotary Tool)

by jakeliedo

If you've ever cracked open a Tesla pack hoping to harvest those premium 21700 cells, you know the pain — the welds are TOUGHER than 18650, the cells are BIGGER, and that little jig you printed for 18650s? Doesn't fit. So you grind freehand, the rotary tool jumps, and another perfectly good cell ends up with a torn wrapper. Same story for 18650 ebike pack salvage — leftover nickel welds, sketchy freehand grinding, ruined wrappers. This jig solves both. ONE TOOL, TWO CELL FORMATS: ✅ 18650 slot — for ebike packs, laptop batteries, vape mods, power bank harvest ✅ 21700 slot — for Tesla pack recovery, high-end flashlight cells, modern ebike packs Just slide the cell into the matching slot, drop your rotary tool on top, and grind flat. Bearings keep the bit perfectly perpendicular. No more jumping. No more torn wrappers. No more wasted cells. If you only deal with 18650, check out my single-cell version here: 👉 [link to 18650 Battery Salvage Jig](https://cults3d.com/en/3d-model/tool/18650-battery-salvage-jig-spot-weld-grinding-tool-for-pro-skit-dremel-rotar) BOM: - 2× MF683ZZ ball bearings - Rotary grinding cylinder tip (3mm shank) - Your rotary tool: Pro'sKit / Dremel / any compatible PRINT SETTINGS: - Any material works (PETG recommended for heat resistance near rotary tool) - 4 perimeters minimum - 30% infill - No supports needed - Print at 1:1 scale (designed for OEM cell dimensions) USE CASES: 🔧 Tesla 4680/21700 pack salvage and rebuild 🔧 Ebike 18650 pack rebuild 🔧 DIY power wall battery harvest 🔧 Vape mod cell recovery 🔧 Flashlight cell prep before spot welding If this saved you a battery wrapper, a like helps other DIY builders find it 🙏