How to Jump-Start a Car (and Why a Portable Jump Starter Beats Cables)
A dead battery usually happens at the worst time. Knowing how to jump-start safely takes ten minutes to learn and can save you a tow.
Jumping with cables
- Park the donor car close enough for the cables to reach, without the vehicles touching. Turn both off and set the parking brakes.
- Open both hoods and identify the battery terminals (+ red, − black).
- Connect red to the dead battery’s positive (+) terminal.
- Connect the other red clamp to the donor battery’s positive (+).
- Connect black to the donor battery’s negative (−).
- Connect the last black clamp to bare, unpainted metal on the dead car’s engine block or chassis, away from the battery. This avoids sparks near battery gases.
- Start the donor car and let it run for a few minutes, then start the dead car.
- Remove the cables in reverse order and keep the jumped car running (or drive it) for at least 20–30 minutes to recharge.
Always check your owner’s manual first. Some modern and hybrid vehicles have specific jump-start points or restrictions.
Why a portable jump starter is better
- No second vehicle needed, which matters on a quiet road or in an empty car park.
- Safer: most have reverse-polarity and short-circuit protection.
- Multi-use: many charge phones and run a flashlight.
Choosing one
- Engine size: pick a peak-amp rating suitable for your engine. Larger gas engines and diesels need more.
- Battery health: lithium units should be recharged every few months.
- Clamp quality: solid copper-tipped clamps and a decent cable length.
- Temperature range: check ratings if you live somewhere very cold.
If your battery is more than 4–5 years old and keeps dying, replace it rather than jumping it repeatedly.