90w portable power supply

Does lvsun 90W work with a laptop?

LVSUN 90W Universal Laptop Charger Ac Power Adapter Supply Cord with USB Port Prepare a spare charger to bring the new life for your device NOW. This computer charger is compatible with most laptops including Hp Compaq Dell Acer Asus Toshiba IBM Lenovo Samsung Sony Fujitsu Gateway Notebook Ultrabook.

What is a 90-watt power supply?

A 90-watt power supply is capable of supplying 90 watts of power. The actual wattage used will depend on the device being charged. It's like if somebody asks for a glass of water and you pull out a gallon jug – they won't have to drink the whole gallon, they can just use a glass full.

What is a 90% efficient power supply?

If a 90% efficient supply is used, it will draw 56W to supply the same load, meaning that it has fewer losses and uses less power from the grid to provide the same output power. The power supplies do not have a constant efficiency; it varies with various factors such as the environmental and load conditions.

Can I use a 200W power supply on a 90W PC?

So you could even use a 200W power supply with your PC and the PC will still only use less than 65W. The problem is when you use a lower Wattage adapter on a computer which needs higher Wattage. So if we use a 45W adapter on a 90W system, there is risk of overheating (usually the power supply).