Nitecore Accessory NBM41 Multi-Purpose Portable Battery Magazine (Yellow)

Ultra-compact and lightweight, the NBM41 is a convenient way to safely store and carry up to 4x 18650/21700 type batteries. It can attach to a belt, bag, or backpack, or store in a pocket.

Features:

• High strength and impact-resistant
• Compatible with: 21700 batteries or 18650 batteries (Batteries Not Included)
• Dimensions (mm): 50 x 54.6 x 99.4
• Weight: ~53g
  
  

See in the official website: https://flashlight.nitecore.com/product/nbm41