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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > Battery length screen shot 4.20 hours !

Battery length screen shot 4.20 hours !
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AppleTalk
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May 13, 2007, 04:18 AM
 
I just wanted to provide a screenshot of my battery time. I turned off the sounds card, turned off bluetooth, turned down brightness and set the preferences to "Better Battery Life".

Just not sure how to put a screenshot here.
     
Simon
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May 13, 2007, 08:57 AM
 
How do you "turn off the sound card"? The MBP doesn't really have a sound card. Did you just turn off the volume?

The image has to be hosted somewhere else. Then you put the URL of the image between img tags. If you need a free image host, try imageshack.us

The 4:20 are a software estimate according to previously recorded battery discharge behavior. It doesn't necessarily give you an accurate prediction. It's an estimate. Depending on the state of your battery, the calibration, and your usage, deviations between the prediction and the actual battery time can be fairly large. I'm not saying 4:20 is impossible, but it's (as you already indicated) not something you'd get during 'normal' usage. And actually that's quite a shame. The MBP is an awesome notebook, but its battery time isn't stellar.
     
seanc
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May 13, 2007, 09:07 AM
 
Haha, I loved the times when I'd wake up my iBook or PowerBook and it'd say 242:08 or something as my remaining battery life.
     
Simon
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May 13, 2007, 09:10 AM
 
Well somehow it's kinda sad. On an old G3 iBook 4:20 would have been nothing special at all. On a modern MBP we see 4:20 and immediately assume the prediction's off.
     
seanc
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May 13, 2007, 09:12 AM
 
True, I could occasionally push 5:00 out of my iBook G4 but never the 6:00 apple tells us we can get.
On the up side, it's much better than what my Dell can get with it's two aging batteries put together.
     
highstakes
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May 13, 2007, 12:58 PM
 
I don't think I've ever gotten past 3:50 on my MBP...
     
AppleTalk  (op)
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May 13, 2007, 04:38 PM
 
Well after testing it out I did indeed get the 4.20 hours out of my battery. I know the indicator is only an estimate so I'll be conservative and say I got 4 hours. I used my MBP from around 6pm to just after 10pm.
     
dagamer34
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May 14, 2007, 06:01 PM
 
The really weird thing is that changing the screen brightness doesn't seem to have as much of an effect as having WiFi on or off. Max battery life drops from 5 hours to 3.5 hours (new battery, recently calibrated). What's up with that?

Oh well, still better than the 1 hour I got fromt he dv9000t I returned with Vista. Bleck.
15" MacBook Pro C2D 2.16Ghz | 2GB RAM | 120GB HDD | 128MB X1600 GPU
     
peeb
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May 14, 2007, 06:20 PM
 
Doesn't 4.20 sound a bit (ahem) high?
     
AppleTalk  (op)
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May 14, 2007, 07:48 PM
 
Originally Posted by peeb View Post
Doesn't 4.20 sound a bit (ahem) high?
Well gee according to Apple:-

Battery and power
15-inch MacBook Pro
60-watt-hour lithium-polymer battery (with integrated charge indicator LEDs) providing up to 5 hours of battery life
You can double check that information if you like at http://www.apple.com/macbookpro/specs.html

Having read so many people mention they only get 2 hours or so I thought I'd mention my battery.
     
peeb
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May 14, 2007, 08:12 PM
 
     
wubrew
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May 21, 2007, 11:14 AM
 
Originally Posted by peeb View Post
Can you find some quote like that with my Pismo 8 yo battery with 3.50 h?
It's "Brewed" not "Juiced"
     
tracemhunter
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Jul 10, 2007, 10:51 PM
 
I can't even get over 1:30 on my PB G4 (last update before the MBP came out). You guys need to shut your mouths. God I'm ready to upgrade.
     
fisherKing
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Jul 10, 2007, 11:58 PM
 
my 12" pb got 4-5 hours (reduced brightness, wifi & bt off);
of course i returned the battery in the Big Recall; my new battery doesn't do nearly as well (best about 4 hours).

guess this is better than the battery exploding (well, maybe...)
"At first, there was Nothing. Then Nothing inverted itself and became Something.
And that is what you all are: inverted Nothings...with potential" (Sun Ra)
     
ghettochild
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Jul 11, 2007, 01:27 AM
 
I get about 4h - 4.5h on my PB w/ BT disabled and normal IMing and web surfing.
17" PB G4 1.67GHz DL
     
Velocity211
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Jul 11, 2007, 02:02 AM
 


That's on my sister's brand new MacBook.
iMac 24" | Core 2 Extreme 2.8GHz | 4GB RAM | 500GB HD
PowerBook G4 15" HR | 1.67GHz | 2GB RAM | 100GB HD
R.I.P 1995 Toyota Supra NA-T
     
Simon
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Jul 11, 2007, 03:10 AM
 
Calibrate it and you'll get more realistic readings.
     
Velocity211
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Jul 11, 2007, 03:30 AM
 
I was just pointing out that the reading isn't a very realistic one. For example, it says i have over four hours on my 7 year old pismo battery, and it never even got to three hours on my PowerBook G4.
iMac 24" | Core 2 Extreme 2.8GHz | 4GB RAM | 500GB HD
PowerBook G4 15" HR | 1.67GHz | 2GB RAM | 100GB HD
R.I.P 1995 Toyota Supra NA-T
     
bballe336
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Jul 11, 2007, 09:23 AM
 
I get 2.5-3 hours on the MBP with casual usage. If I'm using FCP it's more like 1.5.
     
   
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