Will my laptop's 90w power supply be a problem with an airplanes 75w power port?

Question

My laptop's power supply is 90w. An airplane's power port says 75w max. I can buy a power inverter that's either 75w (made for airplanes) or a bigger one. Here are my questions. A) Will this even work or will something get damaged? B) IF it will work, do I just get the 75w inverter or a bigger one? Thanks!

Answer 1

You'll be just fine. The laptop power supply is rated substantially higher than what your laptop is actually drawing under most condtions.

Manufacturers design the power supply for the worst case conditions:
- Maximum brightness of the display
- Maximum performance of the CPU
- Maximum volume
- CD/DVD drive running continuously
- Powering some USB devices
- etc.

Answer 2

It should be fine. Both are max readings not what will be used.
But it could be a problem. IF you pull that 90w. A inverter isn't going to help as it will shut down when you try to pull more than 75w. (over heat or under power or surge protector) If it doesn't shut down your power supply might. If you get a inverter make sure you get something under 70w as the 75w max is output not input. They waste energy.

Best thing to do is get a power supply that is under 75w or buy couple extra battery's.
I hope someone else can help more. As I'm going on allot of unknowns.

Answer 3

Most likely yes... They rate ports such as that very low so when people like yourself apply a larger load it doesnt blow up. I would say you should be fine. There is no point in buying an inverter. You should already have direct current coming out of the port. You should just need an adapter that hooks up to the airplane port.

Answer 4

You will be fine. There are only two scenarios (that I can think of) when your laptop actually consumes 90W of power
* When your laptop battery is charging
* When you are doing something which require lot of processor power

Unless your laptop battery is completely depleted or you are playing some high end games, there is no reason for your laptop to consume 90W power.

hope this helps

Answer 5

lol@ the folk giving thumbs all the way down to NAD. Come on, if somebody needs to void their guarantee and is amazingly very gentle with soldering and dealing with wires and circuits, they easily would desire to do it. Granted, because of the fact the question became asked, i doubt the asker has the be attentive to how or the desire to do it. and as all and sundry else stated, no, different than NAD's somewhat interesting and fully feasible advice, its no longer feasible to capacity a laptop over usb.