MacBook Pro :: Battery Fully Discharging While Plugged In
Jun 15, 2010
So today I was using my MBP that I got about a week ago and all of a sudden I got a low battery message. My MBP was plugged in at the time, and had been plugged in for about the last two days. AC adapter was plugged in and very hot i might add. MagSafe never got disconnected. After I clicked ok on the low battery message my MBP just started charging like I'd been using it on battery power and just plugged it in. I know there was no power outage or anything like that, all my computer stuff is plugged in to a UPS that beeps if it looses power and switches to the UPS battery power. I shut my MBP down when I went to work and when I came back it took a good min before it made the powering on noise and the apple appeared. I checked my battery health and capacity through the system profiler and the condition is normal and it has 7 cycles on it.
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Dec 9, 2009
i've had my macbook for a little under a year and i think i may have shortened my battery power. i have a tendency to leave my laptop plugged in long past the fully charged time and allow it to run through the battery till it shuts down. i do this when i accidentally fall asleep listening to music or leave for work and forget it's on or plugged in. how hard on the battery or laptop is it to do this repeatedly? when it's fully charged it tells me i have roughly 4 hours of battery power available. is that the right amount? is there anything i should do to protect the battery? the manufacturer warranty will be up in march, should i take it in for a check up while i may have the option of not having to pay for it?
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Oct 5, 2010
Funny thing happened today while I took out my MBP and tapped it to the charger. The battery indicator shows one dot not being light up while my MBP was fully charged while the computer was turned off by the way. So I was wondering if over time, like say a week or two that even though your MBP is turned off can it still discharge at a slow rate.
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Dec 15, 2008
I have a MBP which I purchased in August of 07. I have never had a problem with it. However, recently I have noticed that the battery is discharging when the computer lid is shut and the laptop is not plugged in. This weekend I left the laptop unplugged with a full charge and when I arrived home, the battery was around 17%. Also, the health of the battery is 75%.
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Apr 23, 2010
is battery calibration as simple as fully charging and then draining battery ,or is there more steps?
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Oct 17, 2009
I use my MBP 15" (the new one), as my primary machine in my office. I sit by my best usually 10-12hrs a day working on it.
I am trying to figure out what is best to do, keep the AC plugged in or have it un-plugged and only plug it in when the battery is drained (or less then 50%)? I have tried different experiments, plugged in, not-plugged and time is about the same for life of the battery. The true question is, how is is best to do it for the health of the battery.
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Jun 20, 2009
When I am at work I tend to just leave it plugged in all day for 12 hours straight....is this bad to just constantly leave it plugged in?
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Jun 22, 2012
This never used to happen before. Only suddenly. Why is this happening? Is it something to worry about?
Info:
MacBook Pro
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Dec 29, 2010
I just got a new macbook air, it was working fine for a couple of days until yesterday.
The battery seems to be stuck at 98% - or was. I rebooted because I started to lag, and was updating, then I unplugged it and plugged it back in, then it went down to 97%. What confuses me is the fact it had been plugged in (while shut off), for about 8 hours and it should have been charged by the time I got around to using it. When I right click on the battery icon, it says the computer is fully charged.
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May 3, 2008
been using my mba for a few weeks now and i noticed that even when fully charged and still pulled into the charged the battery percentage still says 99% i have yet to see it reach and stay at 100% while being plugged in. is this normal? i am on my 5th cycle if that matters.
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Jun 13, 2010
My MacBook, "2 days old", from when I purchased it at the apple store says it is fully charged at 99% battery. I just re calibrated the battery last boot. Is this normal?
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Jun 25, 2010
I have charged my battery & it says it is charged at 97% is this normal? I googled it & other people have this too & say it is.
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Jan 6, 2010
I would like to know the average battery life after each fully charged (especially when you just bought the unit).
I can only get 4:16hrs each time.
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Mar 26, 2012
I was working late and let my battery drain while working. The computer shut down. I immediately plugged it in but the light on the power adapter didn't turn on (either orange or green) I tried other plugging it into other outlets. Nothing. I left it plugged in all night. Nothing. No light on the adapter and the computer isn't working.
Info:
Macbook Pro, Mac OS X (10.4.8), Processor Speed: 2 GHz
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Apr 16, 2012
I've heard that if I don't disconnect the charger after my macbook is fully charged then the battery life and performance will get reduced and will be weaker.
Info:
MacBook Pro
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Jun 16, 2012
When I bought the mac book pro I was impressed withthe 7 hours battery life, however I have found that when fully charged mine only has 3hours. Is this a fault or did I miss some kind of disclaimer?
Info:
MacBook Pro
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Sep 17, 2010
"Does it harm the battery or reduce battery life, to use the AC adaptor for extended periods while the battery is fully charged?"Someone answered, "I would have to disagree with the others who say that it hurts your battery & reduces battery life by keeping your AC adapter plugged in with a full battery.I have done extensive research and asked many apple employees and have always come to the same conclusion. They all say to keep your laptop plugged into an power supply whenever possible. Only use your battery if you have to, in those times when you are not near a power supply.
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Mar 5, 2010
So I charged my battery to 100% and then unplugged it from the charger. Thats when the battery dipped to 97% instantaneously. It was very odd and somewhat scary. I just bought this MBP 2 days ago! Anything i might be missing? Is it supposed to do that?
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Jun 12, 2012
My battery is fully charged but wont turn on without the charger.It also shuts down after the charger is unplugged.Does anyone have this issue?
Info:
MacBook Pro, iOS 5.1.1
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Dec 4, 2014
I have a MacBook Pro. Keeps completely shutting down all the time when its fully charged and at random times when it is at 65% for example. Do I need to get a battery replacement? Or do I have a virus?
Info:
MacBook Pro
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Apr 28, 2012
I've been told that I should replace its battery since it's been damaged. I haven't had the time or the money yet to buy a new one, and right now, I really need to use it.
Info:
MacBook
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Oct 1, 2009
What is the original(fully charged when new) battery capacity in Mah?
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Aug 24, 2010
I just bought the new MBP 13" 'cause I'm gonna need it for college, but since I'll also use it as "personal computer", for web browsing, playing music and movies, I'll probably have to charge every day. My question is: if I got home and my MBP is dead, I plug it in and use it, when the battery is fully charged, I have to unplug it or I can use it for the night (still plugged in) and just unplug it the next day for school?
Is it somehow harmful to my battery life? And by the way, I've read that "discharge the battery" means just use at least until the 50%, is that right? So if I charge it just when it's about 40%, I just need to recalibrate once a month, and that's all fine, right?
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Oct 12, 2010
My wife and I always leave our MBP plugged up when we are near a charger. This morning the MBP had been plugged up all night, but the battery was dead. I noticed the light was out on the charger so I went to take it out, but when I touched it it turned red indicating that it was now charging. It turns out it is very finicky and randomly stops charging. Anybody else had problems with their charger? It will be Thursday before I have a chance to get to the Apple store.
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Feb 28, 2010
I bought my MacBook Pro 13.3" 5 months ago (according to Coconut Battery) and the battery-loadcycle is already at 51 and 89% battery capacity. Anyway I wanted to know, if I keep my Mac plugged in on the charger will the battery-loadcycles decrease?
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Mar 20, 2010
I bought my macbook exactly two weeks ago (tomorrow) and I'm already starting to have problems. My battery is currently at 10% when not plugged in but then when I plug it in it won't charge. What is wrong with it?
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Jul 28, 2010
Haven't found anything relevant on this. Basically my 2010 15" MBP just emptied its battery and is almost fully charged now. All this while it was plugged into electricity. Why?
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Apr 13, 2012
i very rarely use my MacBookPro away from home (scared of loosing it, LOL) almost all the time it is plugged into the mains 24/7, i just shut the lid when i am not using it. It is about 12 months old, but i notice that the battery meter never goes above 96%, does this mean the battery is on the way out and is going to get progressively worse ?I suppose it means the battery isnt going to last anywhere near 6 or 7 hours if i did unplug it from the mains?
Info:
MacBook Pro, Mac OS X (10.7.2), iPad 2, iPhone 4S
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May 7, 2012
my macbook will not start unless its plugged in to a power source. if you unplug it while running, instead of switching to battery power, it shuts off. the battery is currently at 53%, so i do not know why it will not run on the battery.
Info:
MacBook, Mac OS X (10.5.8)
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Jun 2, 2008
I just noticed that my when I got my macbook plugged in, it's not charging. The icon is the one you got when it's plugged in (with the little fork-shaped thing in the middle), but instead of it saying 'charging' like when the battery isn't full, or 'charged', when it is, it just says 'Not Charging'. It's like it can see the magsafe connector inside, but the juice isn't coming through to the battery, even though the computer itself is powered by the charger since when I click on the power symbol I get 'Power source: Power adapter'.
Also, the magsafe connector itself isn't lit. It used to be green for a bit, but a much weaker green than normal, and before that it wasn't even lit--I've tried with three different wall outlets, one of which was outside my house where I usually use it (it was in a starbucks). Also, when I disconnected the magsafe to get a reading for the battery, it was only 1:35, even though the magsafe light was green (albeit a weak green). If it matters, I'm running 10.5.3. The macbook is still fairly new, bought mid-december, all updates current as I got it set to checking daily and install the minute I get the notice.
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