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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: |
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Haven't used one in 2 years, :p, so I have no idea. I would wager a fair bit more.
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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.
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That's pretty sweet! What kinda laptop is it?
PS: Welcome to the site, :D |
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