Description: 【Universal Compatibility】: The Battery Holder Adapter easily converts 18650 batteries into 26650 LED flashlight batteries, making it ideal for a variety of electronic devices and emergency situations 【Material】: Made of ABS, the Battery Adapter Sleeve ensures safe battery storage while remaining lightweight and durability 【Ease of Use】: The Battery Protective Sleeve is simple to use. Simply insert an 18650 battery into the converter, and it will function like a standard 26650 battery. No tools or complicated steps are required 【Compact and Portable】: Measuring only 2.61cm x 2.61cm x 6.58cm (1.03inch x 1.03inch x 2.59inch), the Battery Holder Converter saves space and is easy to carry, perfect for outdoor adventures or everyday use 【Minimalist Design】: The Battery Storage Case features a clean and elegant appearance, enhancing the user experience Specification: Material: ABS Size Chart: 2.61cmx2.61cmx6.58cm/1.03inchx1.03inchx2.59inch Package Includes: 1 Battery Adapter Sleeve Note: Please allow slightly errors due to manual measurement and different monitors.