MacBook and Battery drain...

coachingguy

macrumors 6502a
Original poster
I've got a Macbook 2ghz, C2D, 2.5 Ram. I love this machine but it has one small trait that is really annoying that I have not experienced with any other Mac laptop. I can have it plugged in all day, I'll put it in my bag fully charged. The next day I'll pull it out of the bag for use at the coffee shop etc... The battery will only have about an hour left or less... I check my Airport - Off, I'll quit apps etc... The battery just drains really fast while asleep. Does anyone else have this battery drain problem?

Coachingguy
 

zblaxberg

Guest
Jan 22, 2007
875
0
I usually get a good 3 hours out of my macbook pro however the batteries for laptops really seem to suck these days. Hopefully battery technology will get better.
 

bigbadnewill

macrumors 6502
Jun 6, 2007
353
0
Hmmm, this makes me a little more dubious about buying a new macbook. I thought the battery life was reportedly 6 hours?!?! I know it says subject to configuration, but i thought it was maybe possible to get 4 hours etc?!?!
 

CalBoy

macrumors 604
May 21, 2007
7,829
36
OP, your post left me with a lot of questions.

Firstly, what's the health of your battery? Use Coconut battery and see how low it is. Since your notebook is almost a year old, I'm guessing your health could be down to about 80% by now (assuming you travel with it often). If this is the case, then it might explain why your battery is draining at the pace it is. flopticalcube indicated that the battery loses about 1% per hour when asleep. If your battery's health is at 80%, then 80-24(for 24 hours)=56% (ok, so the math is bad, but it's probably around there). This still doesn't explain your hour to one half of an hour's battery life, but it might be a contributing factor.

Secondly, how many cycles have you gone through on your battery? I realize that this is similar to the first question, but sometimes apps aren't the best at estimating battery life. If you're above 300 cycles, then what I wrote above probably applies. If you 250 or less, then maybe something else is wrong.

Thirdly, when you awaken your macbook, what apps are you running? If they are energy intensive, then I can see how your battery would drain so quickly.

Fourthly, when you awaken your macbook, what's the percentage displayed? Is it high or low? This might also be affected by your last battery calibration.

Fifthly, do you keep up with your battery calibrations? If not, do so. Your macbook might 'think' it has less power than it really does.

Sixthly, how long does your macbook last from a full charge if you don't let it sleep? IE, charge it, and then use it fully until depletion (you can time this the next time you calibrate). If the time is two hours or under, you might have a bad battery.

Seventhly, do you use any devices with your macbook when you awaken it from sleep? iPod, BT mouse, etc? These things might affect your drain more than you'd like.

Ok, a lot of questions, but if you can answer them for yourself, you'll know if you have a bad battery. If you do, you'll have to contact Apple and tell them you want a new one.
 

coachingguy

macrumors 6502a
Original poster
Okay, I'll do my best...

OP, your post left me with a lot of questions.

Firstly, what's the health of your battery? Use Coconut battery and see how low it is. Since your notebook is almost a year old, I'm guessing your health could be down to about 80% by now (assuming you travel with it often). If this is the case, then it might explain why your battery is draining at the pace it is. flopticalcube indicated that the battery loses about 1% per hour when asleep. If your battery's health is at 80%, then 80-24(for 24 hours)=56% (ok, so the math is bad, but it's probably around there). This still doesn't explain your hour to one half of an hour's battery life, but it might be a contributing factor.

According to Coconut Battery, I'm at 88% or original battery capacity

Secondly, how many cycles have you gone through on your battery? I realize that this is similar to the first question, but sometimes apps aren't the best at estimating battery life. If you're above 300 cycles, then what I wrote above probably applies. If you 250 or less, then maybe something else is wrong.

I've had 48 load cycles

Thirdly, when you awaken your macbook, what apps are you running? If they are energy intensive, then I can see how your battery would drain so quickly.

Often I'll have Word, Keynote, Safari, Firefox, Excel, iPhoto open, but I also try to quit/close those before putting the machine to sleep.

Fourthly, when you awaken your macbook, what's the percentage displayed? Is it high or low? This might also be affected by your last battery calibration.

Roughly 30% or less

Fifthly, do you keep up with your battery calibrations? If not, do so. Your macbook might 'think' it has less power than it really does.

I do the calibrations every few months, I've owned this computer for since late January, I've done it at least twice.

Sixthly, how long does your macbook last from a full charge if you don't let it sleep? IE, charge it, and then use it fully until depletion (you can time this the next time you calibrate). If the time is two hours or under, you might have a bad battery.

I get 3.5+ battery usage under constant usage, more if I keep one app open at a time and drop the backlighting. I can go a whole day with intermittent use.

Seventhly, do you use any devices with your macbook when you awaken it from sleep? iPod, BT mouse, etc? These things might affect your drain more than you'd like.

No.

Ok, a lot of questions, but if you can answer them for yourself, you'll know if you have a bad battery. If you do, you'll have to contact Apple and tell them you want a new one.
Also, the poster after you questioned the 3rd party RAM (OWC), I had this problem even before I upgraded the RAM, which by the way basically eliminated the spinning ball of boredom, even with 4/5 apps open and a dozen windows.

Thanks for helping,

Coachingguy
 

CalBoy

macrumors 604
May 21, 2007
7,829
36
Also, the poster after you questioned the 3rd party RAM (OWC), I had this problem even before I upgraded the RAM, which by the way basically eliminated the spinning ball of boredom, even with 4/5 apps open and a dozen windows.

Thanks for helping,

Coachingguy
When did you put in that RAM? If it was a short while ago, and you still had the problem, I doubt it's RAM related. However, if your problem began to become worse after you put in the RAM, then RAM might be a contributing factor, not a sole factor. Try to answer my questions, and this mystery might clear itself up.