Long-Lasting 9V Batteries for Electronics and Workshop Use These everyday alkaline 9V batteries provide reliable power for electronics projects, sensor nodes, smoke detectors, remote controls, and general workshop equipment. St...

Standard DC Power Connectors for Electronics Projects These female DC barrel jack connectors are the standard 2.1mm inner / 5.5mm outer diameter size compatible with most DC power adapters and wall supplies. Solder-type termina...