Features: Brand new and high quality Our 21700 rechargeable batteries boast high capacity. Perfect for speakers, flashlights, and more. These 3.7V 6000mAh batteries deliver reliable and consistent performance, ensuring your devices stay powered when you need them most. Our rechargeable batteries offer a convenient and cost-effective solution for all your power needs. Suitable for various electronic devices such as speakers, flashlights, and radios. From camping trips to everyday use, our rechargeable batteries are perfect for a wide range of applications. Keep your devices running smoothly and enjoy the power With their metal design. Embrace a more sustainable and eco-friendly power solution. Specifications: Material: Metal Size: Approx. 21x70mm/0.83x2.76inch Note: 1.Please allow 1-2cm error due to manual measurement, make sure you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1x Lithium Battery