Features: LR20 placeholder cylinder not conduct size D fake battery, virtual battery placeholder, suitable for water heaters, gas stove, flashlights, toys, LED lights LR20 D size fake battery connection, with disconnected positive and negative poles, used to connect a power adapter to supply power to the desk lamp, fan, and speaker. LR20 D battery connection, as a conductive conductor, not with charging function, positive and negative poles soldering power adapter can be used for various electronic devices. Not a genuine LR20 D battery, without real power, cannot be used in series, positive and negative poles do not conduct, mainly used for DIY power supply by welding wire. Cannot charge, can be used with a corded power cord or adapter Specifications: Name: Size D Dummy Cell, Not internal Conduction Color: Blue Height: About 58mm/ 2.28in Diameter: About 32mm/1.26in Quantity: 1piece Package Includes: 1PC Size D Battery Placeholder fake battery note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.