21700 Battery Nickel Strips | Pure Nickel Strip | 18650Battery.com

Nickel strip is the spot-weldable connector that ties your cells together when you build a 21700 pack.

It's the piece that carries current from cell to cell — welded across the terminals to make your series and parallel links. Two choices matter: material and size. Pure nickel runs lower resistance and handles more current with less heat, so it's the pick for high-drain packs; nickel-plated steel costs less and works fine for lower-current builds. Match the strip's width and thickness to how much current your pack will pull — more current, more strip.

Since the strip is both a structural and an electrical part of the pack, sizing it to your cells and your load is one of the details worth getting right.

Key features

• Spot-weldable strip for joining cells
• Pure nickel and nickel-plated options
• Multiple sizes for different current loads
• A core part of series/parallel pack building

Built for

• Connecting cells in 21700 packs
• Series and parallel configurations
• High-drain builds (pure nickel for low resistance)
• Custom and DIY pack assembly