Can you replace a 45W laptop charger with a 65W?

As long as it is the same voltage and connector type you can use a higher watt adapter. It will charge the battery a bit faster but other than and the size of the brick you will see no difference. The laptop will only draw the current it needs while running.

Can I use a 65W charger instead of 45W Macbook Air?

Although you should always use the proper wattage adapter for your Apple notebook, you can use an adapter of a higher wattage without issue. No.

Is it safe to use OEM laptop charger?

While the voltage and polarity should match with the original charger, the amperage (and wattage) should exceed the required value or match it. However, one should try to use the original charger supplied by the OEM for safety. Amperage should match or exceed. Lower amperage might fry your charger and heat the laptop.

What is the difference between 45W and 65w charger?

You can definitely use the 65W charger. The brick will be a little larger and heavier and it will charge your battery a bit faster. The plug and the voltage are the same so it works with your laptop fine.

Can I charge a 45 watt laptop with a 90 watt charger?

The power of the charger must always be at least the same as the rated power of the appliance, so a 90W charger for a 45W laptop is fine. What you need to check is that the rest of the parameters are correct, that is, voltage level, and polarity (this is usually not an issue). It depends on the laptop power ratings.

Is it possible to power a laptop with a 90 watt power supply?

Yes, as long as everything else matches (voltage, polarity, etc.). Watts is how much power you can draw, and your laptop will just draw 45W and your powersupply would run nice and cool. If you were to reverse that and draw 90W from a 45W supply, you’ll probably just start a small fire or at least perfume the room with the smell of melting plastic.

Can I use 65W or 90W instead of 45W charger for Inspiron?

Re: Can I use 65W or 90W instead of 45W charger for Inspiron. Yes, you can always use higher wattage Dell chargers with Dell systems. If the system can accept the higher wattage, then you will find that the battery charges faster — and some systems will accept higher wattage than is provided by the AC adapters they actually shipped with.

Can I use 45W power from a 90W power supply?

Yes, you can draw 45W of output power from a 90W power supply if output voltage and polarities of the connectors are the same, as what the rest of the answers indicated. But bear in mind that the Overcurrent protection limit of a 90W power supply is higher than the overcurrent protection limit of a 45W power supply.