Is the red terminal of a car battery positive or negative?

[LaRachel]

The red terminal of a car battery is positive, while the negative terminal is black. It's crucial not to reverse the connections when wiring. Reversed connections can damage all electronic devices in the vehicle. There are + and - signs marked near the battery terminals. Here's more relevant information: 1. About car batteries: The battery is an important component in a vehicle. When the engine isn't running, the battery powers all electronic devices in the car and is also responsible for starting the engine. After the engine starts, the alternator takes over to power the electronic devices and simultaneously charges the battery. 2. Battery performance: During engine startup, the starter motor requires operation, which demands the battery to release a significant current. This tests the battery's performance. If the battery performs poorly, the starter motor's rotation speed will be too low, preventing successful engine startup. The battery is a wearable part that requires regular replacement, as its performance degrades with increasing charge-discharge cycles.