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How do car batteries work?

icon/user/avatar/20 Created with Sketch. By Viktor Kalutsky

A car battery is like a heart it's what gets the blood pumping or in other words gets the electricity to the engine so everything turns on and you get moving. An average car battery will last you for 3-5 years most of us will replace the vehicle by then, but if the batter is not well taken care of it can shorten your battery life drastically.


“Everything You Need to Know About Car Batteries.” Completely Firestone, 22 Nov. 2019,


How does it work?

The battery provides chemical energy into electrical energy which then causes a small joint of electricity to power up the electronics in your car, so if you hear your car not turning that might mean your battery is dead.


Some signs that you might need a new battery.

  1. When turning a key it drags and sounds like the vehicle is having a hard time starting in an indication that you need a new battery

  2. On some vehicles, if the battery power is low you will get either a check engine light or a battery light up in your dash.

  3. If the batter is bloating or swelling it is a good sign that you need to change it as soon as you can because it can start a leak which may cause damage to car components and your skin if touched.

  4. If you get a smell from the engine bay which most likely smell like rotten eggs will be another sign that the battery is running low



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