How to Charge Your Battery Without a Charger

Remove the battery from the device. You will need to work with the battery's contact points. Some phone models use non-removable batteries, so it's essential to know your device well. For most (but not all) Android and Windows phones, the back cover can be removed by applying moderate pressure to the right spot. However, you should avoid attempting this with Apple products.

Find some AA, AAA, or 9V batteries. Unlike the energy from a wall socket (alternating current), the energy in common household batteries is similar to that used in mobile phones or digital cameras.

• You might wonder why you need to use one battery to charge another. Perhaps you expected us to reveal some magical trick to charge your battery without needing an alternative energy source. In reality, that's impossible. One of the fundamental principles of Physics (the law of conservation of energy/mass) states that everything has its cost. Learn to accept this.
• We also recommend charging the battery rather than attempting to power your electronic device directly with replacement batteries. Using inappropriate current or voltage can risk damaging the intricate circuitry inside the device, making these options not worth the risk.

Identify the positive and negative terminals of each battery. For AA batteries and other household types, each end is marked. For most phone batteries, the positive terminal is the one closest to the edge, while the negative terminal is usually the farthest (if there are three or four connectors, the middle one or two are often used for temperature regulation and other functions).

The voltage of the source battery (AA, AAA, or others with sufficient power) must match the battery being charged. Today, typical phone batteries require a direct current above 3.7V to charge. Therefore, multiple AA or AAA batteries or a single 9V battery are ideal as a power source. Remember that each standard AA or AAA battery used at home provides 1.5V. In short, if you only have AA or AAA batteries and need a power source above 3.7V, connect three batteries in series (1.5V + 1.5V + 1.5V = 4.5V).

Prepare two electrical wires. Ideally, they should be insulated but exposed at both ends.

Securely tape or clamp the wires connecting the source battery to the battery being charged. The wires may heat up (but only if done incorrectly). This process takes time, so you don't need to hold them the entire time.

• If using AA or AAA batteries, you need to connect the source batteries in parallel with the battery being charged. This means using wires to connect the negative terminals of all the AA batteries to the negative terminal of the battery being charged, and the same for the positive terminals.

After a while, the battery will be charged. Keep in mind that the battery will only be partially charged enough to serve as a temporary solution, not fully charged.

Use both hands to vigorously rub the battery to generate enough friction to produce heat. Continue doing this for 30 seconds to a few minutes.

• Note: Your battery is not actually being recharged. Some online sources suggest that rubbing the battery provides it with additional energy, possibly from accumulated static electricity. In reality, this understanding is completely incorrect.
• Li-ion batteries, like other pure batteries, release energy through chemical reactions. According to the Arrhenius equation, these reactions become more intense as the temperature rises. Essentially, you are enhancing the battery's conductivity by heating it up.

Reinsert the battery into the electronic device. The battery life at this point is very limited, so make the most of it while you can.