How often do you plug your rMBP

krishmk

macrumors 6502
Original poster
Feb 11, 2010
383
169
Currently a windows user, with Sony Vaio laoptop plugged in all the time, but batter is capped at 80% charge.

Planning to buy rMBP and wondering how often do you plug your mac.

What helps in keeping the battery from damaged too soon.
 

Zakzilla

macrumors member
May 11, 2015
80
52
Los Angeles
I keep my 2015 15" MBP plugged in most of the time at work, and only unplug when I need to roam around. In my experience with my 2010 MBP, limiting the charge cycles was key to making it last 4 years. Basically every time you use only the battery, you're lessening it's ability to hold an additional charge (Apple advertises around 1,000 charges, I got 1,300 out of my old one). I try to plug in whenever I can.

My 2015 15" MBP gets around 7 hours of battery life with normal/light usage
 

TechGod

macrumors 68040
Feb 25, 2014
3,177
914
New Zealand
Well I'm student so I'll be working on Pages and a whole lotta tabs spread across Safari and Chrome. Oh and iTunes is always open, half brightness on the display and the keyboard lighting isn't turned on until I want to go work in my bed (then I put the keyboard lighting up by one) I get on average 10-11 hours.
 

TechGod

macrumors 68040
Feb 25, 2014
3,177
914
New Zealand
Don't keep it plugged in 24/7 but it won't damage it if it stays on charge at 100 percent for a long time.
 

MacCubed

macrumors 68000
Apr 26, 2014
1,618
487
Florida
I have a non-Retina MBP and usually plug it in when it gets low, and at the end of each day. My mom has a rMBP and she leaves it plugged in most of the time, but I tell her to keep the battery working normally, to unplug it periodically.
 

taptic

macrumors 65816
Dec 5, 2012
1,338
437
California
Don't keep it plugged in 24/7 but it won't damage it if it stays on charge at 100 percent for a long time.
I've heard a number of different things on this subject. Some say once your battery is at 100%, leaving it plugged in does the most damage. Is there any definitive source I can figure out how to treat my battery to make it last the longest?
 

KUguardgrl13

macrumors 68020
May 16, 2013
2,491
122
Kansas, USA
I plug it in when it's getting low and needs to be charged so I can keep using it. Since I'm a part-time student that's probably twice a week. I used to charge my old cMBP every night and got 4 1/2 years and over 400 cycles out of it.

I'm no expert, but I do know that you don't want to leave it plugged in 24/7. Probably the best rule of thumb is to use it on battery and plug it in when it needs to be charged.
 

T5BRICK

macrumors G3
Aug 3, 2006
8,102
2,095
Oregon
I've heard a number of different things on this subject. Some say once your battery is at 100%, leaving it plugged in does the most damage. Is there any definitive source I can figure out how to treat my battery to make it last the longest?
Just use the battery when you need to and plug it in when you can. Ideally you want to complete 1 charge cycle per month.
 
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placidity44

macrumors 6502
May 20, 2015
367
166
I'm going to give my opinion on the subject. I really wouldn't worry about it. Apple advertises around 1,000 charges. That doesn't mean at around 1,000 charges your battery is shot it means you'll see a decrease in performance of your battery at around 1,000 charges. I'm a power user and have had my rMBP a year and a half and i'm at a 127 cycle count...no idea how. I'm on the thing all day. I certainly wouldn't leave it plugged in all day every day but there's no harm in leaving it charged up. Just unplug it occasionally and use it as you would. This isn't a windows laptop battery that lasts 3-4 hours. You'll be very impressed with how consistent the batteries are on apple laptops. I get around 6 1/2 - 7 hours on my MacBook Pro Retina. The 13" rMBP will get longer battery life than the 15. Regardless of the model you go with you'll be very satisfied and they're both very capable machines. I always suggest refurbished unless you really really want force touch and faster PCIe speeds...which you probably won't notice as compared to the 2014 models.
 

dwfaust

macrumors 603
Jul 3, 2011
5,975
6,751
I'm going to give my opinion on the subject. I really wouldn't worry about it. Apple advertises around 1,000 charges. That doesn't mean at around 1,000 charges your battery is shot it means you'll see a decrease in performance of your battery at around 1,000 charges. I'm a power user and have had my rMBP a year and a half and i'm at a 127 cycle count...no idea how. I'm on the thing all day. I certainly wouldn't leave it plugged in all day every day but there's no harm in leaving it charged up. Just unplug it occasionally and use it as you would. This isn't a windows laptop battery that lasts 3-4 hours. You'll be very impressed with how consistent the batteries are on apple laptops. I get around 6 1/2 - 7 hours on my MacBook Pro Retina. The 13" rMBP will get longer battery life than the 15. Regardless of the model you go with you'll be very satisfied and they're both very capable machines. I always suggest refurbished unless you really really want force touch and faster PCIe speeds...which you probably won't notice as compared to the 2014 models.
Agree totally with this. My original (mid-2012) rMBP has 170 charge cycles on the battery. I keep it plugged in most of the time, but at least once a week, I unplug it and run it down for several hours, then back on the charger. I often unplug it and change locations. Typically, I only plug it in at my desk - if I am working elsewhere in the house, I'm running on battery. No worries or issues here.
 

leman

macrumors G4
Oct 14, 2008
10,723
5,228
It really doesn't matter that much with those batteries. You will get around 4-5 years of them no matter what you do. On my 2012 model, I averaged over 1 charge cycle per day, and the battery is still doing well after 3 years.
 

cookies!

macrumors 6502
Jul 3, 2011
456
131
Yeah, the newer batteries are rated to hold like 80% of the charge or something until 1,000 cycles. That's crazy long battery life for most people.
 

snaky69

macrumors 603
Mar 14, 2008
5,904
484
I've heard a number of different things on this subject. Some say once your battery is at 100%, leaving it plugged in does the most damage. Is there any definitive source I can figure out how to treat my battery to make it last the longest?
That was true 10 years ago.

LiPo batteries don't really care how you treat them. Deep discharges (ie having your computer run out of juice, then having it die after the reserve power's run down) and excessive heat are the worst things you can do to em.

Apart from that, your battery will die from plain old age around the 5 year old mark, no matter how much you tried taking care of it. There's absolutely NOTHING you can do to prevent that.

The charging circuit built into any modern laptop takes care of the battery for you, preventing overcharging and even trickle charging and discharging the battery to keep it from being stored at 100% if you're plugged in the majority of the time.

I'll bet a few bucks you don't give even a second thought for your cell phone battery. They use the exact same technology. Most cell phones go through a full cycle every day or every other day. They still hold a decent charge 3-4 years down the road without you really doing anything special, or worrying about when to plug it in (or not).

TL;DR: don't worry about it, you have next to zero control over your battery's health.
 
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pollaxe

macrumors 6502
Aug 13, 2010
268
42
West of England
I use my late-2013 15" rMBP at work and it's plugged in about 99% of the time.

I used to use my mid-2011 MBA in a docked configuration so it was constantly powered and that was fine too. So as others have said above, it's not something I particularly think or worry about.
 
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simonsi

macrumors 601
Jan 3, 2014
4,850
734
Auckland
Thats the ambient temperature range specification for the device. Nothing to do with what temps the CPU etc will run at. Sure follow it but its not the be all and end all, its in the section headed "Avoid Extreme Ambient Temperature", nothing more. Far more important to use the battery as you need and charge as and when you can.
 

soupcan

macrumors 6502a
Nov 21, 2014
725
2,926
Netherlands
It's always on the wall. Like, always, unless I need to roam around the house with it. Then, once a month I almost deplete the battery (like to 3 or 2%) and then plug it in again and let it charge to 100%. It keeps the battery from going lazy. It's how I made my last MacBook Air (2011, 13", i5/4/256) last for 4 years and it's still going strong.
 

Orr

macrumors 6502
Oct 8, 2013
363
50
Mine is almost always plugged in. It is my only machine and is essential a desktop with the ability to go mobile when needed. My favorite setup.
 

krishmk

macrumors 6502
Original poster
Feb 11, 2010
383
169
Every day, I unplug my laptop for an hour, do my daily work and other stuff while I am drinking coffee. This has been my routine for almost a year and I am just worried that this will kill the battery sooner than 3 yrs.
 

T5BRICK

macrumors G3
Aug 3, 2006
8,102
2,095
Oregon
Every day, I unplug my laptop for an hour, do my daily work and other stuff while I am drinking coffee. This has been my routine for almost a year and I am just worried that this will kill the battery sooner than 3 yrs.
I don't see any problems with what you're doing. You should plug your laptop in when you can and run it off of the battery when you need to. There is no reason to make it more complicated than that.
 
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