Battery terminals are the points where electrical connections are made to a battery. They typically consist of two metal posts: a positive terminal, usually marked with a "+" sign, and a negative terminal, marked with a "-" sign. These terminals allow the flow of electricity to and from the battery, powering devices like cars and electronic gadgets. The materials used for battery terminals are often lead or other conductive metals to ensure efficient energy transfer. Proper maintenance of battery terminals is essential, as corrosion can hinder performance. Regularly cleaning the terminals can help maintain a reliable connection and prolong the life of the battery.