Features: This LR03 3A false battery connector with dc5.5x2.5mm input (inner positive/outer negatived) safely converts devices to adapter powered operating, featuring steel construction for enhanced conductivity and durability. Available in 5.5x2.1mm or dc5.5x2.5mm input option, this 0V not conduction spacer maintains stable power flowing without charging capability, ideal for replacing physical batteries in low voltages electronics. Perfect for enthusiasts, electronic hobbyists, and parents seeking safe adapter based power solution for children's toy, LED lighting projects, or portable fan assemblies. Effortlessly power desk lamps, craft projects, or educational toy by connecting compatible DC5521 5525 adapters to create permanent corded setups in homes, classrooms, or workshops. Engineered with precise machined not conduction terminals, this battery eliminators prevents accidental short circuits while enabling users to reduce battery waste in daily use electronics. Specifications: Component: Steel nickel-plated Color: red, yellow, blue, green Height: about 44mm Diameter: about 10mm Cord length: 28cm Connection: 5.5x2.1mm, 5.5x2.5mm (optional) Package Includes: 1PC 3A 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.