Nitecore 21700 Batteries

Nitecore 21700 cells are protected, ready-to-use lithium-ion cells from a brand best known for flashlights and portable power.

These aren't bare pack-building cells — Nitecore's 21700s are typically protected, button-top designs, many with onboard USB-C charging, made to drop straight into a flashlight or device. The built-in protection circuit handles overcharge, over-discharge, and short-circuit safety, which makes them an easy, reliable choice for everyday high-output gear.

If you want a high-capacity 21700 that's ready to use out of the package rather than something to weld into a pack, Nitecore is a well-known, dependable pick.

Key features

• Protected, ready-to-use cells from Nitecore
• Button-top designs, many with USB-C charging built in
• 21700 high-capacity format for demanding devices
• Convenient choice for flashlights and everyday gear

Built for

• High-performance flashlights and EDC lights
• USB-rechargeable everyday devices
• High-drain consumer electronics
• Any device needing a protected button-top cell