Portable 18650 to 21700 Battery Size Adapter Cylindrical Cell Battery Converter Simple Battery Conversion Solution

Features: 18650 to 21700 battery conversion cylinder, a practical solution for upgrading your power sources without the need for new batteries.

Craft from plastic and metal materials, for long time use.

Convert your existing 18650 battery into the larger 21700 size.

Perfect for use in a variety of electronic devices such as high powered flashlights and portable mobile power.

Essential accessory for your travel energy needs.

Specifications: Material: Plastic+Metal Color: black Size: about 67x21mm/2.63x0.82inch

Package Includes: 1Pc 18650 to 21700 Battery Holder

note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.