Slot 21700 Battery Chargers Case Lightweight and Durability Storage Box for Long Last Energy Supply Portable

Double 21700 Battery Compatibility: Holds 2 high capacity 21700 batteries (not included) for extended power supply, ideal for outdoor activities like camping and hiking where long lasting energy is essential Flat top positive electrode required Not Solder Design: Innovative nonsolder structure allows easy assembly without professional tool, perfect for enthusiasts and electronics repairers Simplifies battery replacement by eliminating complex soldering processes for quick setup Please pay attention to the direction of the positive and negatives poles After installing the battery, please fully charging it and activate it before outputting Durability Construction: Made from premium shock resistant for enhanced durability while remaining lightweight Provides shock protections and easy portability in backpacks or pockets for commuters and travelers Portability Power Solution: Compact design ensures carrying as backup power