How to charge a screwdriver without a charger

There are quite a lot of interesting life hacks on how to charge a screwdriver without a charger. To do this, you can make a USB drive, use external sources or the cigarette lighter in the car. You can also use a universal device. It allows you to fine-tune the main parameters in the desired ranges to match the battery voltage.

Using USB

If the screwdriver battery does not charge or there is no battery at hand, you can take an external battery and connect it via regular USB. To do this, take equipment that operates at a current of 5 to 7 A. But first you will need to equip the instrument with a USB connector:

1. The housing is dismantled, divided into sections, and the battery itself is removed.
2. Using a sharp knife, cut a slot on the surface of the case - a port will go through it.
3. A fuse with a parameter of 10 Amps is mounted in the slot. It is fixed with hot glue.
4. Carry out test charging.

This method of charging a screwdriver allows you to reach the full capacity of the battery in 12-14 hours. You can leave it overnight and continue using it in the morning.

From car cigarette lighter

Sometimes users try to charge a screwdriver directly from the car cigarette lighter. But this cannot be done, since the voltage of the charger in the car is 12 V.Due to non-compliance, the device may break down and you will have to repair it or buy a new one.

Therefore, it is necessary to use a stepless current regulator. It allows you to set the desired values, after which charging will begin. You can also use ballast resistance, which will help reduce the load.

If there is no exact information about the parameters, you can set the current to 50% less than the optimal values. As for the voltage, it should be minimal. The polarity of the battery is determined using a test tool.

Universal memory

If we talk about how to charge nickel-cadmium batteries or other types of devices, the easiest way is to use universal devices. They allow you to quickly restore the charge of almost any tool. Moreover, with the help of such devices you can adjust the current and voltage. Almost all chargers are equipped with indicator lights. They allow you to control the level at any stage of charging.

External source

Another way to charge a screwdriver battery is to use an external source. It is connected to charging. Can also be connected to a car battery using a cable. Moreover, it is necessary to check whether the power source matches the characteristics of the battery itself. This will prevent overheating.

When building a power circuit, you must include a fuse in it. The rating of this device is related to the operating voltage. For example, the voltage parameter is 18 Volts. Then the current in the fuse should be 11 Amperes. If you use a higher value, the tool may break.

Homemade block

You can also make a homemade block. To do this, proceed as follows:

1. Take an old battery.
2. Unsolder the terminals.
3. Solder the wires, observing polarity.
4. Seal the location of the wiring using thick cardboard or paper.
5. Secure the lid with glue to the surface of the charging cup.
6. Place the unit into the battery through the conductor and test charge it.

Thus, even if there is no charger at hand or it is broken, it is quite possible to get out of such a situation. The main condition is to adjust the current and voltage to the parameters of the device. It is also necessary to monitor the charge level.

The easiest way to check a screwdriver battery is to use a special indicator on the charger. In other cases, it is recommended to focus on time. It may take at least 10 hours to fully charge. This is how long it takes to fully charge a screwdriver battery.