Battery holders, clips, and contacts offer various connection methods such as plugs, PC pins, press-fit, surface and through-hole soldering, snaps, or leads. These components connect circuits and devices to battery-powered sources. Button, cylindrical, or rectangular battery holders support series and parallel forms of connection, accommodating fixed numbers of 1 to 10 or multiples of batteries. This diverse connectivity enables these components to fit different shapes and types of batteries, meeting the needs of various application environments.