📏 21700 nickel tab thickness – quick cheat sheet
0.1mm too thin? 0.3mm overkill?
Here's the rule:
🔋 6–7mm wide → 0.15mm thick (standard) 🔋 8mm wide → 0.2mm thick (high current) 🔋 10mm wide → 0.2–0.3mm thick (max power)
Pro tip: Match tab size to cell discharge rating. A 45A 21700 needs thicker/wider tabs than a 15A one.













