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1067 Views 15 Replies Latest reply: Oct 16, 2005 2:41 PM by Billy Allinson
Currently Being ModeratedApr 28, 2005 9:52 AM (in response to BigRed1982)Sleep mode does use some power. In sleep - the information on current open applications and documents is held in memory ready for instant use when woken. Therefore, the memory circuits are still operational and this does drain the battery over time.
The figure you present is not unreasonable compared to what I have experienced in over two years with my Powerbook. My sense is that the drain is larger when more programs (or large programs) are open when I put the computer to sleep (although I haven't tested this). You could sleep the Powerbook with the power adapter plugged in over night if this bothered you.
Currently Being ModeratedMay 17, 2005 4:16 PM (in response to BigRed1982)I say it is in no way normal at all.
I used to be able to let my book sleep for days and not notice but a very small battery drain. now mine seems to loose maybe 20% overnight. this is why i'm visiting the powerbook area again. might be from an upgrade?
Currently Being ModeratedMay 22, 2005 12:30 PM (in response to BigRed1982)I am noticing the same thing on my powerbook. I used to lose <10% power while sleeping overnight (no applications open).
When I upgraded to Tiger, this power loss while sleeping jumped to ~20% overnight.
It seems that Tiger has poor battery management or is keeping more things open while in sleep mode. Its hard to tell without hearing from more people.
Currently Being ModeratedJun 3, 2005 11:02 PM (in response to BigRed1982)That is not normal. I have the same problem. My battery lost 16%, from 100% to 84%, over a 6 hour period during sleep. I noticed this problem immediately after upgrading to Tiger. It never used that much while using Panther.
Currently Being ModeratedJun 7, 2005 1:22 AM (in response to DavidS)I am also experiencing the same problem, and I'm also on Tiger.
However, I think I'm having battery problems altogether, as my charge is 'stuck' on 43% and it dies without warning.
Search through the help files for resetting the power meter (I think that's what it's called ...)? Sometimes apparently your battery is fine, it's just your computer thinking it has less of a charge than it actually does.
Currently Being ModeratedJun 22, 2005 8:44 PM (in response to Jeff Kearns)I don't believe this problem is related to upgrading to tiger. the os controls how it interprets how much battery capacity is left but it has nothing to do with how much power is used while sleeping. I'm not sure if how much memory is in use will affect power draw, but how much memory you have installed and the quality and health of that memory defiantly will. also how many ports you are monitoring while asleep will affect power draw (ie wake for ...). the os could be responsible for correctly or incorrectly interpreting how much power was used while sleeping. This would not surprise me at all. My pb does not usually shut down until its been at 0% state of charge for 20 minutes. This is due to inaccuracies in how it computes how much power was used
Currently Being ModeratedJul 6, 2005 7:45 AM (in response to BigRed1982)here is an update in my case . i upgraded to tiger and saw no improvement, and for other reasons have gone back to 10.3.5 and have noticed that i'm loosing less battery charge while sleeping.
about 8% over 9 hours. this seems about as good as before.
I use to look a the led indicator as a gauge and would almost always see 5 after sleeping overnight with a full charge. then i started seeing 3 or 4 and i came here. so with being back to 10.3.5 for only a short time now i'm seeing 5 again.
Currently Being ModeratedJul 25, 2005 8:57 PM (in response to hangloe)update no. 2
I went back to tiger 10.4.2 and notice that battery drain is up again during sleep to about 16% over maybe 10 hours.
so say what you will but this is definetly os related.
I hope that apple will fix this for you.... g d it you should be able to get some usage out of your pb after a few days of sleeping.
I no longer care as i have switched to you know what.
it's strange on the other side but no more so then for them over here.
google earth is kinda kool check it out if it comes to mac
also they are not in no way any faster.
Currently Being ModeratedAug 12, 2005 3:02 PM (in response to hangloe)Could the change in usage really be a change in the way each OS reports remaining charge on the battery? The way to tell this apart is to actually leave your battery to run down in sleep and measure the time it actually takes. Has anybody done this or know of someone who has? Are the times really different between panther and tiger? Thanks
Currently Being ModeratedSep 5, 2005 10:42 AM (in response to Amadeus)Amadeus, that would be my guess. Since my battery is pretty well shot (full charge is about 1200 mAh), I lose percentages way faster than I used to, asleep or awake. Running 10.2 (on a separate partition) seems to track the percentages a little more rosily.
What I'd recommend is get a program like iBatt or coconutBattery and check our mAh's after a night of sleeping and compare it between the two OSes. The percentages may be estimated differently. I would think that the on-battery LEDs would be consistent tho.
Currently Being ModeratedOct 1, 2005 9:53 AM (in response to BigRed1982)I am having the exact same issue on a 12". I've never encountered it on my 15" or my 12 ibook so this definitely seems highly unusual...
Where are all you level 4 folks??? Please - shine some light on this one - with 12 posts it is definitely not an isolated issues.
Please help us Obie Wan - you are our only hope.
Currently Being ModeratedOct 3, 2005 1:00 PM (in response to BigRed1982)I've had my PB for a little over a year now, and I almost always let it sleep overnight. Up until recently, it would lose about 5% power overnight and I would leave it plugged in all day when I was at work. In the last couple weeks though, it has started losing more like 10-15% power overnight! I haven't made any major updates or anything.
I just read a couple things: number one, your PB should not be plugged in ALL the time. Number two, you should re-calibrate the battery "every few months" according to Apple. I have only calibrated my battery the initial time and one other time, about 4 months ago. So I think it's time to re-calibrate. I'll let y'all know if it helps!
Currently Being ModeratedOct 3, 2005 1:30 PM (in response to BigRed1982)I've recently changed from a 12" ibook to a 12" powerbook, and I have noticed exactly the same thing! One thing I did do (not for this reason) was an erase and install. I haven't recalibrated the battery yet, but have noticed a slight improvement.
Both the ibook and powerbook used Tiger, the only difference being that I installed Tiger on the ibook and the pb shipped with it. (There was no change in the ibook's battery life after installation).