Features: LR14 C dummies Battery with 5.5x2.5mm Input 0V none conductives design safely replaces real batteries, enabling direct adapter power for continuous device operations without battery replacement. Features manganeses nickel plated construction and selectable 5.5x2.1mm/5.5x2.5mm input jacks (inner positive/outer negatives polarity) to ensures stable conductivity and compatibility with standard power adapters. for enthusiasts, electronics hobbyists, and parents seeking safe, rechargefree power solution for children's toy or educational projects. Perfectly power LED desk lamps, cooling fan, car, and workshop prototypes in homes, offices, or maker spaces requiring uninterrupted power supply. This battery eliminators accessory operates at 0V with not charging capability, from nickel plated manganeses steel for extended service life in frequent device testing scenarios. Specifications: Materials: manganeses steel nickel-plated Color: green Size: length 48mm, diameter 25mm Cord length: 27cm interfaces: 5.5x2.1mm, 5.5x2.5mm (optional) Package Includes: 1PC dummies Battery Connector note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.