Features: This dc5.5x2.1mm/5.5x2.5mm female connector employs not conducting spacer tube soldering technology, ensuring seamless connectivity with a wide ranges of devices. Delivers stable power supply to 18650 devices, eliminating frequent charging through direct power adapter connectivity while maintaining safe not conducting terminals. The ABS plastic housing delivers exceptionally abrasion resistance and impacts resiliences, extending the product's service life. Convenient Installation：Toolless assembly enables rapid installation, simplifying user operating. Featuring 28cm flexible cable and standardized DC5525/5521 connectors, this plastic metal hybrided accessory ensuring easy operating and precise positioning for various electronic setups requiring 18650 battery dimensions. Specifications: Component: Nickel-plated steel false battery size: 65mm/2.56in long, 18mm/0.71in diameter. Wire length: 28cm/11.02in Color: green Output： 5.5x2.1mm female, 5.5x2.5mm female (optional) Package Includes: 1PC 18650 false battery with input cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.