Can I use a universal charger 20V, 4.74 A with laptop 20V, 3.25 A?

Actually the question in the title will not hurt if I baterie or laptop with this charger?
July 8th 19 at 11:42
4 answers
July 8th 19 at 11:44
Important to match the voltage, if the charging amps are less than the laptop consumes the battery charger will die from the stress. In this embodiment, all the rules. Please note whether the charger + and -, some "Chinese" they are the opposite, and it is fraught.
July 8th 19 at 11:46
if I'm not mistaken, the voltage should be the same and the amperage is equal to or greater (but not less).
> and amps must be equal or more (but not less).

Have charger mean? Ie it can be used? - Deron.Kihn commented on July 8th 19 at 11:49
Yes. Yes. - Anita52 commented on July 8th 19 at 11:52
July 8th 19 at 11:48
Typically, the indicated nominal voltage and the current is maximum.
If you to the power supply 20V 5A connect the resistor to 1 kω, then the voltage will be 20V, and the current is 0.02 A.
Ohm's law, however, U=I*R.
It is impossible to simultaneously maintain the voltage and current at any load.
The opposite situation with power supplies for LEDs - they usually maintain specified current through izmeneniya voltage.
So you can use my universal charger with this laptop? - Deron.Kihn commented on July 8th 19 at 11:51
: Yes, of course.
Of course if it properly and you will not mix up the polarity. - Anita52 commented on July 8th 19 at 11:54
July 8th 19 at 11:50
Better not ispolzovatj universal memory altogether. They really hurt the Chinese. The mass of all strange when using the saw. Buy source at your model.

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