Features: The 18650 fake battery connector tube, does not conduct battery placeholder position tube 0V. It comes with a 5.5x2.1mm/5.5x2.5mm (optional) input interfaces (inner positive electrode and outer negatived electrode). 18650 battery connection empty battery setting shell, with 0V used as a conduction conductor and without charging function. It is a battery elimination accessory that can be connection to a DC5.5mm power adapter and used for various electronic devices. Not a real 18650 battery, without real power, positive and negatived electrode do not conduct, mainly used for power supply. Cannot charging, can be used with a corded power cord or adapter. 18650 fake battery housing virtual battery placeholder, with wide applicability . Specifications: Name: 18650 virtual Battery Placeholder Empty Battery Setup Shell 0V Not Conduction with DC5.5mm Cable Color: red, yellow, blue, green(optional) Interfaces: 5.5x2.1mm female , 5.5x2.5mm female (optional) Height: about 65mm/2.56inch Diameter: about 18mm/0.71inch Cord length: 25cm/9.84inch Package Includes: 1Pc 18650 virtual Battery Placeholder with DC5.5mm Input Cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.