Soldering batteries for a screwdriver: we do it carefully and with our own hands - Setafi

If the screwdriver quickly loses its charge, is powered from the mains for a long time until the battery is fully restored, this clearly indicates the need to replace the power system. On the one hand, you can buy a new device, but on the other hand, doing repairs yourself will be much cheaper. Soldering batteries for a screwdriver is a simple procedure. The main stages with photos and comments are described in the article.

Battery Types and Symptoms

Screwdrivers use different types of batteries, the classification depends on the composition:

1. Lithium cadmium - the most affordable, fast charging, have a large number of recharge cycles. But you can charge them only after the battery is completely consumed.
2. Nickel metal hydride are of higher cost. They provide a large number of recharges; when working at high power, they constantly require recharging.
3. Lithium ion are also more expensive. They charge quickly enough, do not have a memory effect, and discharge very slowly when idle.

Repair of lithium batteries in a screwdriver and other types of batteries is required in cases where the following symptoms are observed:

• the device is leaking;
• impossible to remove;
• significantly reduced capacity;
• there is no charge;
• the charge goes too fast, and the device is also discharged just as quickly.

How to solder a battery

Repair work can be done independently. Along with a soldering iron and tin, you will need the following materials and tools:

• flux;
• Screwdriver Set;
• multimeter;
• insulating tape;
• new battery banks;
• side cutters (can be replaced with long nose pliers).

To repair lithium batteries for a screwdriver with your own hands, proceed as follows:

1. First you need to disassemble the body of the device. If it is connected with screws, they are simply unscrewed. But it also happens that both halves are glued together. Then you need to insert a sharp blade, for example, a screwdriver or a self-tapping screw, and wedge it in several places.
2. Recovery of lithium-ion batteries of a screwdriver is possible after a malfunction has been determined. Therefore, it is necessary to go through the multimeter to determine the damaged part. The check is carried out only after the battery is fully charged.
3. All cells are removed from the body of the device and laid out so as to provide access to each contact. Take consecutive measurements and record all readings.
4. After the end of the measurements, the battery is collected again and the device is turned on so that the battery is completely discharged. After that, new measurements are taken and the readings are recorded again. If the voltage difference exceeds 0.5 V, the jar should definitely be replaced.
5. For replacement, it is better to use only new batteries. The condition of the old ones is not always known reliably, moreover, they will not be able to work for a long time. When buying, you need to take into account that the new cells are fully consistent both in size and voltage.
6. For replacement, the defective element is first removed. Moreover, the connecting plate is preliminarily cut off, which it is desirable to leave intact to install a new can.
7. They put a new battery, taking into account the poles. To ensure reliable fastening, it is recommended to wrap all elements with electrical tape. When soldering, it is important to act as quickly as possible so that the battery does not have time to overheat.
8. This completes the repair of the lithium-ion battery of a screwdriver with your own hands. At the last stage, it is fully charged within a few hours. Then leave alone for 24 hours until completely cooled. After that, it is recommended to check the voltage on each element again. All readings should be approximately the same (a difference of up to 0.2 V is allowed).
9. Then the tool is worked for a long time to completely use up the charge, after which it is charged. The cycle is repeated one more time, after which the device can be used for its intended purpose in the normal mode. This will prolong battery life.

If we change batteries in a screwdriver to Li-ion, we need to act quickly and carefully. To do this, prepare a multimeter and other tools and materials in advance, record all the readings and re-solder as quickly as possible.