How to charge a car battery without a charger?

All you have to do is inadvertently leave your car lights on and you end up with a completely drained battery. It’s the kind of little unexpected things that can ruin your day. But don’t worry, it’s easy and sometimes fun to charge your car battery even without a charger. You don’t have to be relentless in mechanics to get there. We will give you some tips to get there.

A flat battery is not good for starting the day. There are several ways to re-float your battery, but we will only talk about how to do so without the help of a charger or other electronic tool.

How to charge a car battery without a charger

Alligator clips

Indeed, this is the name given to a pair of pliers designed to serve as a connector between two batteries. But to use them to recharge your battery you will obviously need the crocodile clips and a functional vehicle with a working battery.

The procedure is quite simple.

First, you must bring the two cars closer together. They must be side by side or nose to nose. Then open both covers and locate the two batteries. Do not make a mistake between alternator and battery. If the need arises, refer to the user guide to determine where it is located. Not all cars have their batteries in the same place. After locating it, disconnect the terminals from both batteries. These are the positive and negative boundaries. But remember, the priority is the positive boundary. Note that the vehicle in running order must be switched on and kept in neutral with the hand brake applied.

The second part consists of connecting the two batteries using the crocodile clips. They must be connected to the terminals, paying attention to the colours (red corresponds to the positive terminal, black to the negative terminal), without forgetting that the priority goes to the positive terminal. After connecting, start the broken vehicle and disconnect the respective clamps. Reconnect the terminals and close your cover. Now drive at a constant speed for a minimum of 15 minutes so that the alternator can recharge your battery.

Is it not progressing? Push! Push!

If you don’t have crocodile clips at hand, all you have to do is push your vehicle to restart the engine. You probably won’t be able to do it alone, find one or two people to help you push your car down a hill. Let it take a little speed, then you engage the second gear while gradually releasing the clutch. This will start the engine again. The alternator will fill the battery.

A battery failure can happen to anyone, so here are some solutions to fix it and continue your day peacefully. However, there are a few rules to follow to avoid small incidents. Place the cars close to each other, respect the colors of the cables and above all avoid mixing them. Disconnect the positive terminal first.


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