Go Back   MacRumors Forums > Apple Hardware > Notebooks > MacBook Pro

Reply
 
Thread Tools Search this Thread Display Modes
Old Feb 10, 2007, 12:35 PM   #1
cool11
macrumors 65816
 
Join Date: Sep 2006
How to preserve battery

I just bought a new mbp and I wonder how to use it in order to preserve battery from bad use.

I had pc laptops in the past and I all I did is to have them connected to the socket all the time. No special care about their batteries.
Disconnection happened only when I had to travel.
Is this safe to do it with macbook pro too?

What do I have to know and what do I have to do in order to have my battery in good condition for years to come?
cool11 is offline   0 Reply With Quote
Old Feb 10, 2007, 12:48 PM   #2
topicolo
macrumors 68000
 
topicolo's Avatar
 
Join Date: Jun 2002
Location: Ottawa, ON
Officially, the best possible state for lithium ion batteries is to leave them at about 40% charge at room temp or lower. Keeping them inside of the laptop exposes them to higher temperatures that speeds up the chemical degradation process that begins the moment the batteries are manufactured. I've kept my laptop's batteries separate from my ibook whenever it's parked on the desk and 3.5 years later, Coconutbattery says that it's still at 98% of original capacity and that I've only gone through 36 charge cycles--practically brand new.
__________________
Do not disturb. Blood alcohol experiment in progress...
topicolo is offline   0 Reply With Quote
Old Feb 10, 2007, 12:57 PM   #3
66217
Guest
 
Join Date: Jan 2006
Quote:
Originally Posted by topicolo View Post
Officially, the best possible state for lithium ion batteries is to leave them at about 40% charge at room temp or lower. Keeping them inside of the laptop exposes them to higher temperatures that speeds up the chemical degradation process that begins the moment the batteries are manufactured. I've kept my laptop's batteries separate from my ibook whenever it's parked on the desk and 3.5 years later, Coconutbattery says that it's still at 98% of original capacity and that I've only gone through 36 charge cycles--practically brand new.
Even though this is true, it is a pain to be taking the battery out every time.

I've had my battery for about 6 months and it is still at 99% capacity. I give it a normal use: at mornings I use it without a charger at college, and at evening I have it the rest of the time connected to the wall. There is nothing wrong at doing this, the battery would stop charging when it charges completely.

The best advice is to use your MBP normally, don't care a lot about the battery (just make the normal calibration every 1-2 months). The worst that can happens is that you would need to buy a new one in 2-3 years. When you will probably would be thinking of buying a new Mac.

Roco,
66217 is offline   0 Reply With Quote
Old Feb 10, 2007, 01:04 PM   #4
bellychris
macrumors member
 
Join Date: Sep 2003
Location: New Jersey
apple's advice http://www.apple.com/batteries/notebooks.html
bellychris is offline   0 Reply With Quote
Old Feb 10, 2007, 01:31 PM   #5
cool11
Thread Starter
macrumors 65816
 
Join Date: Sep 2006
How you make calibration of battery?

I see two numbers in the place it display the info about battery. 98% and 100%. What does these two numbers mean?
cool11 is offline   0 Reply With Quote
Old Feb 10, 2007, 01:56 PM   #6
66217
Guest
 
Join Date: Jan 2006
Quote:
Originally Posted by cool11 View Post
How you make calibration of battery?

I see two numbers in the place it display the info about battery. 98% and 100%. What does these two numbers mean?
If you are using Coconut Battery: the first one means the amount of charge the battery has. the second is the maximum capacity. This last one can be misleading if you don't make a calibration of the battery.

To make a calibration see the manual of your MB/MBP. It is simple.

1- Charge completely the battery.
2- Disconnect from wall and use it to the point the Mac turns forces itself to sleep mode.
3- Leave it 1-2 hrs like that,
4- Charge it completely again (without tuning it on).
66217 is offline   0 Reply With Quote
Old Feb 10, 2007, 03:20 PM   #7
bousozoku
Moderator emeritus
 
Join Date: Jun 2002
Location: Gone but not forgotten.
Quote:
Originally Posted by topicolo View Post
Officially, the best possible state for lithium ion batteries is to leave them at about 40% charge at room temp or lower. Keeping them inside of the laptop exposes them to higher temperatures that speeds up the chemical degradation process that begins the moment the batteries are manufactured. I've kept my laptop's batteries separate from my ibook whenever it's parked on the desk and 3.5 years later, Coconutbattery says that it's still at 98% of original capacity and that I've only gone through 36 charge cycles--practically brand new.
I was in a similar situation and my PowerBook just turned 2 years old. I was at 36 charges and 94 %.

I did a calibration after being on the road during Christmas and now, it's showing 88 % with 37 loadcycles, which is more likely due to age and use.
bousozoku is offline   0 Reply With Quote
Old Feb 10, 2007, 04:27 PM   #8
smueboy
macrumors 6502a
 
smueboy's Avatar
 
Join Date: Oct 2006
Location: Oz
Quote:
Originally Posted by Roco View Post
3- Leave it 1-2 hrs like that,
4- Charge it completely again (without tuning it on).
3. Apple says leave it for at least 5 hours.
4. Leave connected until fully charged, but you can use it at this stage:

http://docs.info.apple.com/article.html?artnum=86284
__________________
15" MBP 2.33 C2D; 15" MBP 3.06 C2D; Mini 2.66 C2D; Mac Pro 2x 2.93 Xeon
Those are my principles, and if you don't like them.... well, i have others.
smueboy is offline   0 Reply With Quote
Old Feb 10, 2007, 10:53 PM   #9
Nuks
macrumors 6502a
 
Join Date: Feb 2006
Quote:
Originally Posted by Roco View Post
Even though this is true, it is a pain to be taking the battery out every time.

I've had my battery for about 6 months and it is still at 99% capacity. I give it a normal use: at mornings I use it without a charger at college, and at evening I have it the rest of the time connected to the wall. There is nothing wrong at doing this, the battery would stop charging when it charges completely.

The best advice is to use your MBP normally, don't care a lot about the battery (just make the normal calibration every 1-2 months). The worst that can happens is that you would need to buy a new one in 2-3 years. When you will probably would be thinking of buying a new Mac.

Roco,
Wow, that's crazy. I've had mine for 5 months, same usage as you and it's at 77%.
Nuks is offline   0 Reply With Quote
Old Feb 10, 2007, 10:58 PM   #10
e12a
macrumors 68000
 
e12a's Avatar
 
Join Date: Oct 2006
Calibrate once a month

Discharge (cycle) at least twice a week.

4 months old and 99% capacity (5455).
__________________
[inquiring about MBP types]"we either have the regular, or the ultimate edition." -Apple sales rep
"could you just tell me the specs?"
e12a is offline   0 Reply With Quote
Old Feb 10, 2007, 11:22 PM   #11
Silentwave
macrumors 68000
 
Join Date: May 2006
Location: Gainesville, FL
Send a message via AIM to Silentwave Send a message via MSN to Silentwave Send a message via Skype™ to Silentwave
Please remember, you should keep the battery in at all times. The macbook Pro uses the battery to compensate for voltage spikes that could damage the processor etc.

Removing the battery instantly downclocks the processor cores to 1GHz and they will NOT change their speed.
__________________
+ R3D
Macs, Cameras and way too much data for a sane person to have to store.
Silentwave is offline   0 Reply With Quote
Old Feb 18, 2007, 11:02 AM   #12
cool11
Thread Starter
macrumors 65816
 
Join Date: Sep 2006
Quote:
Originally Posted by e12a View Post
Calibrate once a month

Discharge (cycle) at least twice a week.

4 months old and 99% capacity (5455).

I am not sure I understood the difference between calibration and discharging. Is it the time I wait until I use the machine again?

If i discharge and then charge, is this calibrations process?

I have no problem pull the power cord off.
Untill now I have my mbp always connected and yesterday it was 98, today is 97%, tomorrow maybe will be 96%. Is this normal?

Is it good to discharge every week?
cool11 is offline   0 Reply With Quote
Old Feb 18, 2007, 05:16 PM   #13
blackscooby
macrumors 6502
 
Join Date: May 2005
Location: Cheshire, UK
Send a message via AIM to blackscooby Send a message via MSN to blackscooby
I'm now at 88%
63 load cycles and 9 months old.

Is there any way I can get the 12% back ?
I've followed the calibration a number of times and I always seem to loose and not gain !
__________________
Mid 2011 Mac Mini
24" iMac 3.06
blackscooby is offline   0 Reply With Quote
Old Feb 18, 2007, 07:33 PM   #14
Habusho
macrumors 6502
 
Join Date: Aug 2006
Quote:
Originally Posted by Silentwave View Post
Please remember, you should keep the battery in at all times. The macbook Pro uses the battery to compensate for voltage spikes that could damage the processor etc.

Removing the battery instantly downclocks the processor cores to 1GHz and they will NOT change their speed.
I've never heard this before. Where did you hear this?
Habusho is offline   0 Reply With Quote
Old Feb 18, 2007, 07:41 PM   #15
e12a
macrumors 68000
 
e12a's Avatar
 
Join Date: Oct 2006
Quote:
Originally Posted by cool11 View Post
I am not sure I understood the difference between calibration and discharging. Is it the time I wait until I use the machine again?

If i discharge and then charge, is this calibrations process?

I have no problem pull the power cord off.
Untill now I have my mbp always connected and yesterday it was 98, today is 97%, tomorrow maybe will be 96%. Is this normal?

Is it good to discharge every week?
discharging doesnt necessarily require draining the battery completely, but enough to add one cycle to the battery. This can be monitored by either Coconut battery or iStat. Calibration requires discharging the battery, but they are not the same. Calibration is all about calibrating the onboard chip. Discharging is just "flexing" the battery cells and is usually done in regular use (unplugged).
__________________
[inquiring about MBP types]"we either have the regular, or the ultimate edition." -Apple sales rep
"could you just tell me the specs?"
e12a is offline   0 Reply With Quote
Old Feb 18, 2007, 08:18 PM   #16
Silentwave
macrumors 68000
 
Join Date: May 2006
Location: Gainesville, FL
Send a message via AIM to Silentwave Send a message via MSN to Silentwave Send a message via Skype™ to Silentwave
Quote:
Originally Posted by Habusho View Post
I've never heard this before. Where did you hear this?
it's been posted several times, I think there was also something on apple's site, plus if you use a CPU monitoring utility you can see it happen.
__________________
+ R3D
Macs, Cameras and way too much data for a sane person to have to store.
Silentwave is offline   0 Reply With Quote
Old Feb 18, 2007, 09:45 PM   #17
TheCreeper
macrumors member
 
Join Date: Feb 2007
weird my brand new MB shows (from Coconut):

CURRENT BATTERY CHARGE= 4984
MAXIMUM BATTERY CHARGE= 5009
99%

CURRENT BATTERY CAPACITY= 5009
ORIGINAL BATTERY CAPACITY= 5200
96%

BATTERY LOAD CYCLES= 1
AGE OF YOUR MAC= 2WKS
CHARGER CONNECTED= YES
BATTERY IS CHARGING= NO

does this seem right?

my 2.5yr old iBook G4 battery does not charge anymore. The second its unplugged it goes into sleep within 10 seconds. i only discharged that battery once (the day I brought it home). it started to do this last month. so the battery slowly started to lose its ability to hold a charge. now it does not charge.
TheCreeper is offline   0 Reply With Quote
Old Feb 28, 2007, 05:57 PM   #18
CedarPoint182
macrumors member
 
Join Date: Oct 2006
Just to clarify, if your battery is at 60% after being mobile with it, is it better to let the battery completely drain and then charge it, or is it better to plug it in at its current state?
CedarPoint182 is offline   0 Reply With Quote
Old Feb 28, 2007, 09:48 PM   #19
e12a
macrumors 68000
 
e12a's Avatar
 
Join Date: Oct 2006
Quote:
Originally Posted by CedarPoint182 View Post
Just to clarify, if your battery is at 60% after being mobile with it, is it better to let the battery completely drain and then charge it, or is it better to plug it in at its current state?
It doesnt hurt, because Li-Ion batteries do not have a "memory" issue found in Ni-MH batteries, which affects the total capacity of the battery.

but you also need to cycle the cells (near to complete discharge) to keep the battery healthy.
__________________
[inquiring about MBP types]"we either have the regular, or the ultimate edition." -Apple sales rep
"could you just tell me the specs?"
e12a is offline   0 Reply With Quote
Old Mar 18, 2007, 03:15 PM   #20
cool11
Thread Starter
macrumors 65816
 
Join Date: Sep 2006
I disconnected mbp from power and it run out of battery.
No it is charged again but it does not display two numbers, only one(100%).
Why this happened, how can I revert it to display two numbers(current charge & 100%)?
cool11 is offline   0 Reply With Quote
Old Mar 18, 2007, 04:36 PM   #21
sycho
macrumors 6502a
 
sycho's Avatar
 
Join Date: Oct 2006
Quote:
Originally Posted by Silentwave View Post
Please remember, you should keep the battery in at all times. The macbook Pro uses the battery to compensate for voltage spikes that could damage the processor etc.
Simply untrue. The power adapter is a switching power supply, which are extremely stable, even during brownouts and what not. The supply works by converting the incoming 120Volts AC to 120Volts DC, then the internal circuitry then will "switch" the 120Volts DC at extremely high frequencies through (small) transformers, which is then rectified and regulated to the desired voltage. This is why the power supply is much much smaller and more efficient then a standard linear power supply.
Quote:
Removing the battery instantly downclocks the processor cores to 1GHz and they will NOT change their speed.
This is 100% true, I can verify this and I have even made a thread regarding it.
sycho is offline   0 Reply With Quote
Old Jun 3, 2007, 08:40 AM   #22
cool11
Thread Starter
macrumors 65816
 
Join Date: Sep 2006
Please believe me, all this time I read so many opinions about battery life and health.
Still I do not know what to believe and what is the best practice to follow.
Every user seem to do different things about the battery.

I do not know what to do.

Disconnect the mbp once a week and use it until the battery runs out of power?

Just use it on connected to the socket all the time?

After reading your posts, at first I decided to unplug the power cord once in a week. But then I thought, why drain battery without any reason?

From the other hand, I have my mbp connected 3 weeks now and from 99% I see 96%. If it continue like that, in a few weeks I will see my battery about 80%.

Why cant I take a right decision? Of course I will buy a battery sometime in the future but I want to preserve it as much as I can. I use to take care of all my computers, especially now that I have a superb mpb.

Why cant we have a clear guide about it, the majority of us?
cool11 is offline   0 Reply With Quote
Old Jun 3, 2007, 10:46 AM   #23
thejadedmonkey
macrumors 604
 
thejadedmonkey's Avatar
 
Join Date: May 2005
Location: Pa
Send a message via AIM to thejadedmonkey
Guys, just use your batteries how you want to. When they die, get a new one. you have superb MBP's and part of them is a 3+ hour battery life. Use it how ever you want, and then get a new one in a few years.

It's what I do
__________________
MacBook 17" MacBook Pro iPod Nano Apple TV
PS4 Custom Windows 8.1 Desktop WP8.1
"Good judgment comes from experience,
experience comes from bad judgment."
- Mulla Nasrudin
thejadedmonkey is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Notebooks > MacBook Pro

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
How do I use my MacBook Pro to preserve battery life? pilesofstones MacBook Pro 8 Apr 29, 2014 05:18 PM
iPhone: ios 6 preserve BB, HELP Tunny Jailbreaks and iOS Hacks 8 Jan 22, 2013 02:46 PM
preserve battery when laptop used as desktop UNCMo96 MacBook Pro 1 Sep 23, 2012 03:10 PM
After battery is full, should I unplug it to preserve the battery shelf life? urbantea MacBook Pro 2 Aug 26, 2012 02:42 AM
iPhone: preserve firmware upgrade to 5.1.1 ineediphone Jailbreaks and iOS Hacks 1 Aug 14, 2012 07:52 PM

Forum Jump

All times are GMT -5. The time now is 08:05 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC