Laptop power use when charging
 

I think Z asked me about this a while back...

My laptop uses about 19-23 watts in normal use, when charging the battery from empty it uses 40 through the first 40%, 12 up until about 80%, and then 5%. This roughly reflects the speed in which it charges.

:turtle:

And for comparison who much energy does the desktop use:)

Haven't used one in 2 years, :p, so I have no idea. I would wager a fair bit more.

I'll let you know within a week - unless someone beats me to it :p

I'll do desktop + CRT monitor and desktop + LCD (for better comparison)

My 19" CRTs use ~60W each, so going with an LCD is cost prohibitive... :(
My old PIII uses ~70W at full usage, my Sempron64 ~120W, and the PIV uses ~160W. I just nabbed a C7 mobo combo, a serial receiver, and a gig of ram for ~$110 shipped, which I'm gonna replace most of what the Sempron64 and PIII do. Should pay itself off in a half year or so. :D

My laptop uses 25-35 watts depending on what it is doing. It is a Dell, and it was one of the ones affected by the battery problem. So... I don't even use a battery anymore. It is too large to drag around with me anyways. 17" monitor and weight to the sucker.

I am waiting about another year for desktops to get more efficient. The new Intel processors just sip the electricity, and put out really decent numbers. I just can't get by with a laptop. To me, there is a big hit in usability that comes with trading in the desktop for a laptop.

So while at home - I measured one of my parents' desktops.... I meant to do both LCD and CRT - but I totally forgot to measure the LCD :/


Desktop HP a305 (kinda old - but works well for light duty purposes)
Celeron 2.70/2.69GHz
256 RAM
XP SP2
17" CRT (e-machines)

Stand By (Things off - plugged in)
Computer
1W

Monitor
3W

Computer + Monitor
4W


Monitor On (self test) - Computer off (plugged in)
49W



ON

Startup w/ monitor
90-125W

Idle w/ monitor
~78W


Complete Stand By as Per Operating System

6W



320Gig External HD

17W (33W while spinning up)

-----
They just bought a new machine (Intel Core2 - 3Gig Memory - 22" LCD) :eek: I'll test that next time I'm home... They have another machine that has a 17" LCD - I'll test that too....

My laptop draws 20 watts to charge the battery and will charge the battery from 98% discharge in two hours, after that it draws 6-7 watts while on with the web browser running, one watt less if I turn the backlight on the monitor off, it seems to be able to run for 3-4 hours just off the battery.

That's pretty sweet! What kinda laptop is it?

PS: Welcome to the site, :D

Sweet, the OLPC is a great thing, :)

Didya do the "Give 1 Get 1" dealy?

My MacBook Pro with 17" monitor uses 14 watts running straight off wall power while using the wireless for internet connection.

The Mac has fantastic power features built in. I set mine to "Better Energy Savings" setting all the time other than when I am doing video editing.

yeah, altho they don't really have their **** together, the instructions that came with it basicly wasted paper telling me how to open it, and where the ports were, but didn't tell me how to connect to a wireless network to get online (where the rest of the instructions are) or the specs of the ports so you could figure out what devices might work with them, then their whole instruction part of the web page is more like a sales page, insted of an instructions page, so they keep it all really simple, and don't really tell you how to do anything, the more advanced instructions are in the form of a wiki that came together so fast, and with more questions then answers that it is almost impossible to find the information that you are looking for.

other then that the laptop it's self is pretty cool, very solid, like you could beat someone with it, drop it, stand on it, and it would hold up, the only reason I could see for getting a case for it would be to carry a larger key board and mouse with, but I don't do that and get along fine, it just makes typing slow.
most of the programs are for kids, and helping you "learn" altho there is no program for writting web pages, and the photos that it can take with the built in camera are not Jpeg, or any other standard format as far as I can tell, altho it can veiw those kind of images, it can't handle viewing folders full of them, as it doesn't reconize the exsistance of the folder, so you open a web browser, view the image, close the web broswer, open another one, with another image, and on it goes, about 40 seconds each to load the browser.
if I could add only one thing, it would be a web browser with tabs, and a way to view flash.
my next computer is going to be an Eee, as soon as they start selling the 8gig and upgrade to 2 gigs of ram.

I imagine you could remaster the distro and include ff/flash or something similar while removing what ya weren't interested in, or just include the appropriate files on a SD card. Man those eee lappys look sweet, a bit pricey, but sweet.