Why are the power pack of computers still very big?

[King Belieal]

Technology devices are getting smaller and smaller everyday. Even the accessories of popular tech devices are made to be smaller. But one accessory doesn't ever seem to reduce in size. That's the power pack of computers.

Why are the power pack of computers still very bulky in these days and times?

 

[Kross]

Power packs are still bulky today because of the heat they generate. They need a surface area that is big to spread the heat.

 

[eLdavis]

Till data it still remains large due to the physical space computers need today to be able to house the needed things from heat management and transformers and such.