Macbook Power Consumption

scott523

macrumors 6502a
Sep 8, 2006
833
85
Saint Charles, MO
I had the old MB and have the new MB (both 2.0GHz though) now and so far, I'd say there's little difference. IMO, you could prolly get 10 minutes more or less from the previous MB and I think there's still too much power consumed. :confused:
 

clicq

macrumors member
Nov 11, 2006
52
0
This could be fuzzy math, but here's one attempt at giving you an average power usage number.

Doing normal things (surfing the web with iChat and iTunes), I get about 3 hours of battery life. Apple claims the battery is a 55 watt-hour battery. According to Wikipedia, one watt-hour is equivalent to 3,600 joules. A watt is defined, according to Wikipedia, as 1 joule/second.

Thus, 55 watt-hours is 198000 joules, 3 hours is 10800 seconds, and the power consumption averages 198000/10800 watts = 18.33 watts.

I could be completely wrong on this, but I think it's about as good an answer as you'll get, unless someone has a Kill-a-watt power meter.

I have a 2.0ghz Macbook by the way
 

TequilaBoobs

macrumors 6502a
Nov 12, 2006
592
0
when i lived w/my much older cousin, he made me lick the battery to gauge its power. you should do the same.
 

Phatpat

macrumors 6502a
Original poster
Jun 15, 2003
903
2
Cambridge, MA
Nice. Seems like it might be a legit thought process, but 18.33 seems too little above the idle power consumption of 17. I'll check it with some friends later; unfortunately I need it by Tuesday and won't have time to order a Kill-a-watt.

This could be fuzzy math, but here's one attempt at giving you an average power usage number.

Doing normal things (surfing the web with iChat and iTunes), I get about 3 hours of battery life. Apple claims the battery is a 55 watt-hour battery. According to Wikipedia, one watt-hour is equivalent to 3,600 joules. A watt is defined, according to Wikipedia, as 1 joule/second.

Thus, 55 watt-hours is 198000 joules, 3 hours is 10800 seconds, and the power consumption averages 198000/10800 watts = 18.33 watts.

I could be completely wrong on this, but I think it's about as good an answer as you'll get, unless someone has a Kill-a-watt power meter.

I have a 2.0ghz Macbook by the way
 

deadpixels

macrumors 6502a
Oct 30, 2006
913
0
from here
power consumption of mbpro cd, the c2d is probably not far away.:D



Current consumption
The current consumption without load shows a very good value compared with other notebooks tested up to now. Also under load the consumption remains still below average.

Minimum (everything from and/or to minimum): 19 watts
Idle (normal brightness): 23 watts
Maximally (full load inclusive Bluetooth & WLAN): 53 watts
 

yorhekin

macrumors newbie
Oct 17, 2018
7
1
Reichertshausen
Has anyone compared the power consumptions after build installers and before and after security updates yet? Could it be that the power consumption has increased from OS to OS and from Security Update to Security Update?

A detailed analysis and research on this concern would be welcome.

PS: Running on OS X Sierra. Last OS X Sierra build installer with the latest Sierra Security Update but without Safari 12.0 Update.
 
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