How to charge phone with battery

Prepare

1. Cutting pliers, flat nose pliers
2. 4-sided flat screwdriver
3. 1 rocker switch or a toggle switch commonly used in children's toys.
4. 1 car adapter (car charger) supplies power to the USB port.
5. 1 piece of wire of arbitrary length.
6. Tape.

How to make a phone charger from a car battery

1. Step 1: To ensure safety during the process, the first thing you need to do is disconnect the battery from the vehicle's electrical system.
2. Step 2: Identify the negative (-) and positive (+) terminals of both the car adapter and the battery. This must be done correctly because incorrect polarity can damage the device.
3. Step 3: Connect the battery wires securely and carefully, following the rule (-) connects to (-) and (+) connects to (+). In this step, you need to pay attention to ensure that the connections are well insulated to ensure safety.
4. Step 4: Check the entire connection system before turning on the switch.
5. Step 5: Double check the output voltage of the homemade charger with a voltage meter before connecting it to the phone.
6. Step 6: Connect the phone to the charger and start charging.

What to note when charging batteries with accumulators?

The process of charging a phone battery on a car battery has many potential risks of causing unsafety, even explosion. Therefore, you should only choose this method of charging your phone battery when absolutely necessary. When doing this, you need to choose a quality battery and accessories, and carefully connect the wires.

To ensure safety and safe battery charging, you should equip yourself with a spare battery charger.