Also known as solder slugs, these pellets create strong, electrically conductive connections between battery terminal lugs and cable. They are measured for the precise amount of solder you need. These pellets make stronger connections than those created by crimping or compression. Place a pellet in your lug and heat it until melted. Put your cable in the liquid solder and hold until the solder solidifies for a secure connection. These pellets do not have a flux core, so you can choose the flux that works best for your application.