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<blockquote data-quote="lclev" data-source="post: 1632083" data-attributes="member: 307555">Years ago back when we first got electricity and personal computers....there was a ton of debate over leaving a computer on or to shut it down when not in use.&nbsp; Most arguments for shutting it down had to do with clearing the memory and the fact a UPC was unheard of for the basic user - home or work.&nbsp; So power outages, surges and brown outs were a huge killer of computer electronics. Today with the availability of quality UPC's and surge protectors leaving a computer on is not such an issue.&nbsp; Jake is correct in stating the biggest load on a computer is the initial inrush of power.&nbsp; Add to that cold components and the stress is even higher.&nbsp; When a computer is on, the components are kept at nice toasty warm temperature that is kept with in an operational optimum.&nbsp; Those warm components expand when kept warm which is expected.&nbsp; When they cool off, they retract like we do when cold.&nbsp; Now add the initial current for start up to cold components and if they are weak and ready to fail, they will fail.&nbsp; Also servers all over the world run for years without ever being turned off unless for maintenance or to be replaced.I keep my work desktop main editor on all the time.&nbsp; My back up editor, I shut down as she does not get used every day and sometimes weeks go by before I need to use her.&nbsp; I have them both on one UPC so I am trying to conserve battery time for those moments the power goes off.&nbsp; My MB Pro pretty much stays on and plugged in all the time.&nbsp; My MB Air gets a work out.&nbsp; I close the lid to &quot;sleep&quot; it and I usually remove the charger and leave it off during the day.&nbsp; I like to type with it in my lap and the cord is annoying.&nbsp; I will plug it in at night with the battery level at anywhere between 60%-20%.&nbsp; That is just the way I like to use my Air.&nbsp; Not saying it is the best way for the battery life.&nbsp;&nbsp; Lisa</blockquote>

[QUOTE="lclev, post: 1632083, member: 307555"] Years ago back when we first got electricity and personal computers....there was a ton of debate over leaving a computer on or to shut it down when not in use. Most arguments for shutting it down had to do with clearing the memory and the fact a UPC was unheard of for the basic user - home or work. So power outages, surges and brown outs were a huge killer of computer electronics. Today with the availability of quality UPC's and surge protectors leaving a computer on is not such an issue. Jake is correct in stating the biggest load on a computer is the initial inrush of power. Add to that cold components and the stress is even higher. When a computer is on, the components are kept at nice toasty warm temperature that is kept with in an operational optimum. Those warm components expand when kept warm which is expected. When they cool off, they retract like we do when cold. Now add the initial current for start up to cold components and if they are weak and ready to fail, they will fail. Also servers all over the world run for years without ever being turned off unless for maintenance or to be replaced. I keep my work desktop main editor on all the time. My back up editor, I shut down as she does not get used every day and sometimes weeks go by before I need to use her. I have them both on one UPC so I am trying to conserve battery time for those moments the power goes off. My MB Pro pretty much stays on and plugged in all the time. My MB Air gets a work out. I close the lid to "sleep" it and I usually remove the charger and leave it off during the day. I like to type with it in my lap and the cord is annoying. I will plug it in at night with the battery level at anywhere between 60%-20%. That is just the way I like to use my Air. Not saying it is the best way for the battery life. Lisa [/QUOTE]

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