Features: Maximizes your battery potential with our 18650 to 21700 Battery Adapter, a cost effective solution that breathes new into your existing batteries for enhances device compatibility. Crafted from durability ABS material with copper plate gold contacts, this lightweight converter ensures high conductivity and reliability, transforming your 18650 batteries into 21700 powerhouses. Suitable for enthusiasts and gadget users who have abundance of 18650 batteries and seekings practical way to utilize them in 21700 required devices without additional investment. Whether powering up high performances flashlights or keep your power sources ready, this adapter is perfect for outdoor adventures, emergency, or everyday electronic needs. Upgrades your devices energy capacity effortlessly with this easy to use 18650 to 21700 Battery Adapter, ensuring your electronics are charged and ready to go. Specifications: Component:Plastic Size:Approx.59x21mm/2.72x0.83inch 1pc 18650 To 21700 Battery Adapter Package Includes: 1pc 18650 To 21700 Battery Adapter note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.