ATX Power Supply Conversion for 14.4V & 18V Screwdrivers: 350W, 10A on 12V Line Impact

Gentlemen, I have read a bit about the conversion of battery powered screwdrivers for electricity from a 12V computer atx power supply.
And just like with a 14.4V screwdriver, there should be no problems, how will the screwdriver behave rated voltage 18V with such a low voltage from the power supply?
The power of the power supply is 350W and 10A on the 12V line.

Moderated By Madrik:

Let us not confuse the basic concepts of electrical quantities.

It may work, but it will be weaker

And do I reduce the demand for Volt by unwinding the coils on the screwdriver's motor?

In many computer converters, changing the output voltage value is problematic and requires additional replacement of capacitors when changing up. Now, with converter prices as in https://pl.aliexpress.com/item/250-W-DC-DC-Bo...Modu-Zasilania-Pr-du-Sta-ego/32671862611.html (about $ 4) it is probably not worth combining while maintaining battery power - for example from a car battery?

You only destroy the motor, it is better not to buy a 12-14V. Of course I mean the winding unwinding.

I use an old atx power supply for 2 12V and 18V screwdrivers, both work satisfactorily, without any modifications, just something like switching power supply, power line 12V 11A.

zasilaczen wrote:

Gentlemen, I have read a bit about the conversion of battery powered screwdrivers for electricity from a 12V computer atx power supply.

And have you read what is the point of such a modification?
A screwdriver is by definition a portable device, not a network device.
Adding the cable is the same as chaining the car in a chain so it doesn't drive too far.
If you want to power the device from the mains, buy a mains screwdriver. You will avoid complications with the power supply and voltage conversion.

Second, the higher the voltage the better. That is why Chinese is 12-14 V, and brand or professional equipment is 18-24 V, and even more.
Higher voltage means less current at the same power, less losses, more power at similar current. The lower the current, the longer the use of the battery.

If you have a screwdriver and the battery has died, and the new one is unprofitable, dispose of this device. There's a brush motor and a bad mechanic that is about to crash too. Such a modification will not provide much longer work, but it will increase the cost of the device, which you will throw away anyway.

There is no point in reducing the tension in this case.
Not everything you find on the Internet makes sense and is the right solution.
Unfortunately, a bad starting material will always produce crap, which you wouldn't do to improve.

Oh, I see a friend who always buys new equipment, even if he can have it for free ... if you can have something for free or for pennies (power supply PLN 5), why not, I have been using such a screwdriver at home for 2-3 years and it works great

Madrik wrote:

A screwdriver is by definition a portable device, not a network device.

I power the screwdriver myself, the mechanics of which are so durable that it is a pity to dispose of it, and due to its age and the cost of a new battery, it is not worth buying a new one. And the difficulty of buying.
I power it from the power supply. A very good solution, the equipment got a second life, which the manufacturer does not like.
And I often use it instead of a drill and as a screwdriver when the cables don't bother me. I will also say that compared to the battery it is very light! For me, all rechargeable batteries should have the option to be powered from the power supply.
I don't know where this desire to dispose of everything quickly

If the conversion is cheap and simple why not?
The 18 battery on the battery should theoretically do better than 14, and what does it look like after powering them from the power supply? Feel the difference? 18 is weaker than 14?

zasilaczen wrote:

The 18th battery on the battery should theoretically do better than 14

Absolutely not.
The advantage of higher voltage is that the batteries are loaded with lower current, theoretically more will be squeezed out of a less loaded battery. We assume the same engine power, but the supply voltage is not a decisive parameter.
I suspect that a screwdriver powered by default of 14.4V connected to the ~ 12V power supply will be more efficient than powered by default from 18V connected to the same power supply.
We assume that the voltage on the power supply during the load will not drop to 8V
Ideally, the power supply should have at least the ~ 10% more than the power supply of the screwdriver requires, because with the currents that flow from the power supply and cable lengths, voltage drops are significant