Charger / AC Adapter RDY 19V 3.42A 65W for Acer Aspire 5741G 5742 5742G E1-521 E1-531 E1-531G E1-570 E1-571 E1-571G

model device
The laptop model is usually located on the bottom of the device. Read it and enter it into the shop's search engine.
e.g. Asus K53SV / HP Pavilion G6 / MacBook Pro 13 A1278 value of INPUT / OUTPUT
On the nameplate of the power supply, the voltage and current values are marked as OUTPUT, and on the bottom of the laptop the same parameters are marked as INPUT. Read some of them and enter them into the store's search engine, adding the brand of the device to them. Make sure the plug of the found power adapter is correct.
e.g. Asus 19V 4.74A / Dell 19.5V 4.62A / Lenovo 20V 3.25A.

With such small differences, it is acceptable. However, we must remember to use power supplies with higher power, not less, because at lower power the laptop may not work.

It will be suitable for our laptop if the connector diameter meets the outer diameter specification, eg 5.5mm, and the output parameters are compatible. What are output parameters? It is the value of voltage[V] and current[A] given by the power supply for a laptop, eg 19V 4.74A.

When choosing a new power supply for your laptop, you should check the voltage of the charger - this parameter should match your original device.

Definitely yes. Please do not forget, however, that the output voltage [V] must be the same as in the original power supply.

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.

There are several factors to consider when choosing chargers. The most important of these are: the power of the charger, the type of input and the fast charging technologies used.

Power Delivery is a fast charging technology. Put simply, chargers that support this variant automatically select the right charge for the connected device, ensuring fast and efficient charging.