jump starting a car battery

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how to jump start a car battery (updated february 16 2025)

By Evelyn Reed

Published: 16 Feb 2025

Dead Battery Blues: A Personal Tale

Let me tell you, there's nothing quite like the sinking feeling you get when you turn the key and… nothing. Silence. Except maybe the chirping of crickets in the dead of night, mocking your stranded car. That happened to me last summer, during a family road trip. We were hours from anywhere, kids were starting to whine about being hungry (again!), and I was seriously contemplating my life choices. It was, as my teenage son so eloquently put it, 'a total disaster'. But that's what makes this story a little more 'real' than you'd expect. And guess what? I survived. And you will too. That's what this blog is all about: helping you jump-start your car battery and avoid a similar fate! So buckle up, let's learn how to prevent (or fix) this annoying car trouble.

stranded car on a highway

stranded car on a highway | Image: Supplied

Understanding Your Car's Battery System

Before we dive into the nitty-gritty of jump-starting, let's quickly talk about what's happening under your hood. Your car's battery is like a tiny power plant, storing electrical energy to crank your engine. Over time, and especially in cold weather, this energy can deplete. It's kind of like your phone running out of juice – annoying, right? And just like you need a charger for your phone, you need a jump start for your car's battery. However, unlike charging your phone, you'll need another car to help. You've got this!

diagram of a car battery

diagram of a car battery | Image: Supplied

Gathering Your Supplies: The Jump-Start Arsenal

Now that we understand the basics, let's gather our weapons. To jump-start your car, you'll need a few key things:

  • Jumper cables: Make sure these are in good condition, not all frayed and broken. Trust me on this one; I've been there! Cheap ones can break easily, so invest in a decent pair.
  • A car with a working battery: This is your superhero, your knight in shining armor, your battery savior. Ask a friend for help if needed.
  • Gloves (optional but recommended): Battery terminals can be a bit corrosive, and you don't want to get that on your skin, especially if it's cold. It's not fun!
  • Safety glasses (also optional but recommended): Just in case things get a little bit explosive (unlikely but better safe than sorry).

Got everything? Great! Let's move on!

jumper cables and a car battery

jumper cables and a car battery | Image: Supplied

Jump Starting Your Car: A Step-by-Step Guide

Here's the action-packed part. It might seem complicated, but following these steps carefully will make it easier. Remember to do this with both cars turned OFF. The most important thing is safety:

  1. Park safely: Find a level surface and ensure both vehicles are off and the parking brakes are engaged. Trust me, a rolling car is the opposite of a helpful car.
  2. Connect the cables: Connect the red (+) clamp to the positive (+) terminal on your dead battery and then to the positive terminal on the good battery. Next, connect the black (-) clamp to the negative (-) terminal on the good battery and then to an unpainted metal surface on your dead car (away from the battery).
  3. Start the good car: Let it run for a few minutes to charge up your dead battery.
  4. Start your car: Try starting your car's engine. If it doesn't start right away, give it another try. You might need to give the battery a little more time to charge.
  5. Disconnect cables carefully: Remove the cables in reverse order, black then red. Always double-check that the cables aren't touching anything metal during removal. This is important for safety!

And that's it! You did it!

After the Jump Start: What to Do Next

You're back on the road, but your battery saga isn't quite over yet. It's really important to get to the root of the problem, why was the battery dead in the first place? Did you leave something on overnight? Is there a problem with your alternator? Driving around with a weak battery is a recipe for getting stuck again and getting more stressed. It's best to have a mechanic check it out to make sure everything is in top condition and prevent future emergencies. I wish I'd known that earlier!

mechanic checking car battery

mechanic checking car battery | Image: Supplied

The greatest breakthroughs often come from unexpected places. Sometimes, it's simply knowing how to utilize the tools and resources around you.

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