How to charge a battery without a charger: 10 steps (with pictures)

How to charge a battery without a charger: 10 steps (with pictures)
How to charge a battery without a charger: 10 steps (with pictures)

Is your camera or laptop battery drained just when you need it most? Do you urgently need a battery? If you find yourself in a situation where you don't have a charger with you and you need to find a solution, there are a few tips that can save you.


Method 1 of 2: Use a battery to charge a battery

Charge a Battery Without a Charger Step 1

Step 1. Remove the battery from the device

You should be able to connect your battery to a battery. To do this, you need to remove it from your phone. Some models are not designed to let you do this. So you need to know if you can remove yours from your device. Most Android and Windows devices allow you to easily remove the protective cover from your phone, an option you won't find in Apple products.

Charge a Battery Without a Charger Step 2

Step 2. Find AA, AAA, or 9 volt batteries

The current from ordinary sockets is alternating current, but the current from household batteries is the same as your cell phone or camera.

  • It may seem odd to you to recharge a battery with a battery that is ultimately just another kind of battery. You might have been expecting a magic trick that lets you recharge your battery without the need for another source of electrical current. But that's not really possible because according to the fundamental laws of physics (the law of conservation of energy and mass), you can't get anything out of nothing. We will therefore have to do with it.
  • It is better to charge your battery rather than plugging in your electronic device and using the spare batteries directly. Using the wrong current or voltage can damage the complex circuitry of your device. These methods are obviously not worth the trouble.
Charge a Battery Without a Charger Step 3

Step 3. Identify the positive and negative poles of each battery

On AA batteries and other household batteries, the poles are clearly marked. On most cell phone batteries, the positive pole is closest to the edge of the battery while the negative pole is furthest from it. There may be three or four poles, but the middle ones are used for temperature adjustment and other functions.

Charge a Battery Without a Charger Step 4

Step 4. Adjust the voltage

The voltage obtained with the batteries (AA, AAA or other) must be identical to that of your battery. Today, a phone battery normally needs more than 3.7V to be recharged. The ideal would therefore be to use a 9 V battery or several AA or AAA batteries. Remember that the normal AA and AAA batteries you use in your home provide 1.5V each. To get more than 3.7V, you must therefore have 3 AA or AAA batteries connected in series: 1, 5 + 1, 5 + 1, 5 = 4, 5 (you had found it, right?). With 3 AA or AAA batteries you will therefore have 4.5 V.

Charge a Battery Without a Charger Step 5

Step 5. Find two metal wires

They should be covered with plastic insulation except for their ends.

Step 6. Attach the wires to the stack

Connect them to the battery that will supply the electric current as well as to the battery that you want to recharge. The wires may heat up, but, if you plug everything in properly, you won't have this problem. You should also be aware that the battery will take a long time to charge, and you don't need to hold the wires until it is fully charged.

If you are using AA or AAA batteries, you can connect them in series with each other before attaching them to the battery you want to recharge. This means that you have to connect the negative pole of all the batteries to the negative pole of the battery that needs to be recharged and do the same for the positive pole

Step 7. Check the load

Your battery should be recharged after a while. It probably won't charge fully, but you can at least use it to run your camera or phone while you make an emergency call.

Method 2 of 2: Use the friction trick

Step 1. Remove the battery from the electronic device

Hold it in your hands.

Step 2. Rub the battery vigorously

Use both hands for this to generate enough friction and heat. Keep rubbing it for 30 seconds to several minutes.

  • Note that your battery is not recharging. Some claim that the friction of the battery generates electric current by the build-up of static electricity, which is totally false.
  • Lithium-ion batteries, like any other battery, release electricity through chemical reactions. As the Arrhenius equation predicted, these reactions become more and more powerful with increasing temperature. In fact, you can improve the conductivity of the battery by increasing its temperature.

Step 3. Put the battery back into the electronic device

You will probably only have a few minutes to enjoy the little energy you have left, so use them wisely!


  • Be sure to turn off the electronic device before removing the battery, as you may change the settings.
  • Do not attempt to recharge batteries that are not rechargeable. Do not try to do this with alkaline or other single use or limited use batteries.
  • Do not overcharge your batteries. Lithium-ion batteries may explode if overcharged.

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