21700 Button Top Protected Batteries

Button top protected 21700 cells bundle two device-friendly features: a raised positive terminal and a built-in protection circuit.

The button top is a raised positive contact that many devices need to close their circuit — a flush flat-top cell often won't physically connect. The protection circuit, built into the cell, adds safety by guarding against overcharge, over-discharge, and short circuit. The combination makes these an easy, lower-risk pick for running a device straight out of the package.

Choose this type when your device requires a button top, or when you want the extra safety of a protected cell — typically flashlights and consumer electronics. If you're spot-welding a custom pack instead, go with a flat-top unprotected cell; button tops and protection circuits get in the way of pack building.

Key features

• Raised button-top terminal for device fitment
• Onboard protection against overcharge, over-discharge, and shorts
• Extra safety margin for everyday use
• Ready to use — no pack assembly required

Built for

• Flashlights and EDC lights
• Consumer electronics needing a button top
• Any device requiring a protected cell
• Ready-to-use high-capacity power