Q:

Is red positive or negative?

A:

Quick Answer

When dealing with car batteries, a red lead, terminal or cover marks the positive end of the battery. The black lead, or plain metal in some cases, is the negative end.

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Full Answer

Understanding which terminal is positive and which is negative is vital for safety when dealing with a car battery. When replacing a car battery, it is important to disconnect the cable going to the negative terminal first and then the positive terminal. When connecting jumper cables to a car battery, linking the positive terminal from the donor battery to the negative terminal on the recipient battery, or vice versa, leads to an electrical hazard.

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