Should the Car Battery Be Connected to the Positive or Negative Terminal First?
2 Answers
When charging a car battery, the positive terminal should be connected first, and when disconnecting after charging, the negative terminal should be removed first. If the car headlights noticeably dim, it indicates that the car battery needs to be charged to prevent the battery from being completely depleted, which could render the car immobile and cause travel inconvenience. Here are some tips on battery usage: 1. The typical lifespan of a car battery is two to three years, not exceeding three years. 2. Pay attention to battery maintenance. Avoid using electrical devices in the car before starting the engine, and do not turn off the engine immediately after starting the car. 3. Frequent discharging and recharging of the battery can cause a memory effect, which may impair the battery's normal function, accelerate aging, and shorten its lifespan.
When replacing a car battery, I always connect the positive terminal first, followed by the negative. This helps avoid short-circuit risks because if you connect the negative terminal first, a wrench touching the metal car body could cause sparks or even battery explosion. I've seen many beginners make mistakes, resulting in blown fuses or damaged vehicle circuits, which are a hassle to repair. The correct sequence is: first turn off all electrical devices, ensure the engine is off, then secure the positive terminal with a wrench before connecting the negative. Finally, test if the headlights work to confirm a solid connection. In routine maintenance, it's also important to regularly check for corrosion on battery terminals and clean them with a brush to prevent poor contact. This habit has saved me a lot of money and time.
