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Laptop power supply - what voltage?
When choosing a new power supply for your laptop, you should check the voltage of the charger - this parameter should match your original device.
Is it allowed to connect a power supply with higher amperage?
Definitely yes. Please do not forget, however, that the output voltage [V] must be the same as in the original power supply.
Is it possible to connect a weaker power supply to the laptop?
Using an AC adapter with a lower amperage than the original can cause a number of adverse changes in the operation of your laptop. For example, a power supply that is too weak can overheat because the laptop's components are not being supplied with sufficient power. We therefore recommend that you use chargers with the same or higher amperage.