Concerning devices that store electrical power which can be used to run various devices in the absence of external power.

learn more… | top users | synonyms (1)

1
vote
1answer
348 views

MacBook Pro Suddenly Goes to Sleep and Will Not Wake Up

I have 15-inch, Mid 2010 MacBook Pro running Mac OS X Lion 10.7.5. It will occasionally (every other day) without warning go to sleep. I can see the sleep indicator on, but otherwise it is completely ...
-1
votes
1answer
849 views

White screen problem in iphone 3gs

Hello i have iPhone 3 gs and i have amazing problem when i lock my phone then after 15-20 seconds its shows white screen then i have to restart it what to do in this case is this a battery problem ? ...
0
votes
1answer
23 views

Does Exist any way to change battery of MBP 2012 13" with a bigger one?

The question is simple, can i make an upgrade of my battery? I mounted a OWC datadoubler, and now i'm using an SSD and HDD configuration. But my battery life dropped from 6 to 3h 30... i would like to ...
0
votes
3answers
7k views

Why the iPhone doesn't automatically switch 3G off when connected to a wireless network?

This doesn't make any sense to me: why the iPhone doesn't automatically switch 3G off when connected to a wireless network? I always thought iPhone did that since the very beginning and my battery ...
1
vote
1answer
709 views

Using bash/terminal to get number of battery recharge cycles

I would like to get the number of recharge cycles using bash (terminal commands). I understand the following command will display all of the battery data, but I want the cycle count on its own ioreg ...
5
votes
4answers
4k views

How to disable the SpeedStep when using MacBook Pro without a battery?

First of all, the specs: MacBook Pro (15-inch, Early 2011) OS X 10.9.1 (Mavericks) 2.3 GHz Intel Core i7 8 GB RAM The Problem Recently, my battery randomly died and I had to disconnect it, ...
3
votes
2answers
131 views

Poor battery stats on rMBP late-2013

I unpacked my new MacBook only 2 days ago and it showed 9-10 hours of battery life (as advertised). I didn't calibrate it, since it is no longer necessary (I was told). Today I noticed that it ...
0
votes
1answer
104 views

New MacBook Battery and charging

I bought a new battery as my old one cut out the system. Since installing the new one its been acting really strange. It's been sitting around 2-5% charge for the past few hours and now I've got it ...
0
votes
0answers
69 views

Macbook charger/MagSafe DC-in drive issues?

Hello everyone—I'm having really bizarre issues with my macbook charging. Prepare for a lot of information. The facts are these: I have an A1286 15" unibody macbook pro My genuine apple 85w ...
1
vote
0answers
75 views

Battery value in terminal different to battery value in menu bar

My MacBook Pro Retina is currently reporting 100% battery in the menu bar, however if I run the following command in terminal; ioreg -l -w0 |grep Capacity The following is returned; | | ...
2
votes
2answers
1k views

iPhone 5 shuts down at 25% on iOS 7.0.4

My iPhone 5 has been shutting down earlier than normal at lower battery levels. First, it started to shut down around 10%, then it increased to 15%, 20%, and finally 25%. I used to be able to run it ...
0
votes
0answers
38 views

iPhone 4 doesn't power on, but is recognised by PC

My fiancée's iPhone 4 doesn't seem to want to boot. I originally thought it was just not charging, but my PC recognises it when I plug it in via USB. Might just be that the USB logic (e.g. FTDI) ...
3
votes
2answers
458 views

iPhone 5 Battery - Help me diagnose issue

I'm having a weird issue with my iPhone 5, that I think is related to the battery, but might be something else. Symptoms The battery indicator is wrong. It sticks to the value it fetches when ...
0
votes
1answer
193 views

How to get Apple to repair iPhone under statutory warranty?

My iphone 5's battery after a bit more than a year is dying. I bought the iPhone via the German Apple Online Store. Hence I have 24 months of EU statutory warranty. The iPhone is otherwise in great ...
0
votes
1answer
40 views

Energy saver 101 : sleeps after or when battery is at x hours?

Using Mac OSX on a macbook pro. in energy saver - battery tab : if i have sleep at 1 hour, does that mean the computer will sleep after an hour on battery OR when there is a about an hour of battery ...
1
vote
1answer
4k views

How do you turn on a iphone 4 when your power button doesn't work and your phone wont charge?

This is the second time my phone turns off on full battery and I cant turn it back on last time i waited two days i guess it drained the battery and all but this time my phone was on 30 % I've called ...
5
votes
1answer
152 views

What is the font the battery percentage uses?

A bit of a stupid question, but what is the font the battery percentage (pictured below) in OS X uses? It is not the standard font you can get by calling [NSFont menuBarFontOfSize:0], I have ...
1
vote
0answers
248 views

MBP restarting twice after going into deep sleep from a fully drained battery

Ever since I installed Mavericks on my 15" Mid-2012 MBP (4GB), I've noticed that if I let my machine completely drain to 0% and it (supposedly) goes into Deep Sleep, when I plug it back in and ...
0
votes
1answer
40 views

How do I fix my iPhone 4?

I am currently having problems with my iPhone. So it froze last night and went completely black. so I left it for a while, hoping it would un-freeze. then all of a sudden it turned off and I tried to ...
5
votes
1answer
968 views

How to have my MacBook Pro safely hibernate when out of juice?

My all new MacBook Pro was on the battery, and warned me that the battery was almost finished. I left the Mac take care of himself. Later, I plugged the Mac and I pressed the button Power. Hearing the ...
1
vote
3answers
4k views

2013 macbook retina has extremely short battery life

I've recently bought the new macbook pro 13" retina (2013) this November and noticed that it has extremely short battery life compared to my old macbook pro 13" (2010). On a full charge, my new ...
2
votes
2answers
3k views

Difference between autopoweroff and standby in pmset

I just got a new Retina MacBook Pro 15". After getting some downloads interrupted due to the computer going to sleep (even on AC power), I started looking at the man page for the pmset command. I did ...
1
vote
1answer
39 views

Lots of weird stuff happening today

So I'll just list the symptoms I've experienced in the last few hours, so far I can't seem to find a pattern, suffice to say the macbook is virtually unusable for my purposes. It's a 2010 Macbook ...
0
votes
3answers
380 views

Poor battery performance on MacBook Pro [duplicate]

I have recently bought a very expensive new MacBook Pro with 8 GB memory and now I am frustrated by its very fast battery drainage. Often I see only 2 hours left on full battery charge! Right now it ...
0
votes
0answers
18 views

Should I change battery charger if I get the long-lasting battery of mid-2010 white unibody Macbook?

I saw that it's possible to use the mid-2010 White Unibody Macbook's battery on late 2009 White Unibody Macbook. If I upgrade my late 2009 Macbook's battery, should I also change my battery charger? ...
0
votes
3answers
242 views

Replacement battery for Macbook Air 2011: equal to or better than original

I need to replace a battery for my Macbook Air 13" mid-2011. There is no Apple's own repair service where I live, and I'm fairly savvy with electronics to do my own repairs. How can I identify ...
4
votes
1answer
19k views

What causes iPhone low battery crashes? Is there a software fix?

Some iPhone users (especially those with devices that've been in use for a while) encounter a problem where the device crashes once the battery gets low. For example: "After updating to iOS 7 ...
3
votes
1answer
873 views

Regular crashes on iPhone 4S/iOS 6.1.1: due to old battery, or because of updated-for-iOS-7 apps?

For the past 6 weeks, 2-3 times a week my two-year-old iPhone 4S (with no replacement parts) has crashed in the middle of use. I get a black screen with a spinner, and then it powers down. After ...
0
votes
0answers
60 views

Are the new MacBook Unibody Aluminum Batteries better than the old ones?

Of course a new battery is almost certainly better than an old one. That's not what I'm asking about. I used the same battery in my Mac for five years but it sucked from day one really, only lasted ...
1
vote
0answers
34 views

Can anything cause the battery “cycles count” to appear LOWER than it really is?

My Macbook battery is essentially dead. It has behaved erratically for the past 1.5 year. In any case I checked the cycle count today and found only 270 something. If I recall correctly, I had much ...
2
votes
2answers
507 views

Ways to extend lap top battery life on Mavericks

What are some ways to extend lap top battery life on Mavericks? I've heard that disabling notification center via the terminal can help. I've also had a friend tell me that disabling window animations ...
2
votes
2answers
217 views

2008 MacBook (A1181) won't boot from battery

I have a 2008 13" (2.4GHz) white MacBook that will only boot from mains power. If you attempt to boot from the battery it's as if it's not even connected. Once you get even past the initial startup ...
0
votes
2answers
62 views

How iPad Air gives almost same battery back up even with less battery pack?

Sorry if it sounds like a noob question, earlier iPads have 42.5Wh battery pack and gives 10 hours of battery. But new iPad Air has only 32.5Wh battery, but it also gives same amount of battery backup ...
0
votes
2answers
711 views

iPad battery drain after update to iOS 7

After update to iOS 7.0.4 from version 5.x, my iPad's battery has only fraction of full charge as fast as in 24 hours. I also noticed that iPad is staying warm even after several hours of idle time ...
0
votes
1answer
177 views

Can imac G3 DV 400 be booted when PRAM battery is empty?

We have an old imac G3 DV 400 MHz (at the moment I do not have access to the machine and want to prepare for my visit.) My goal is to save the data from the hard disk to an external drive and reset ...
0
votes
1answer
93 views

Do i need to worry about a battery that appears to charge correctly but has a “Service Battery” warning?

I have an early 2008 macbook that was running well until a week ago. I noticed the battery was not charging anymore. So I bought another battery for $20 on amazon. I installed the new battery and ...
0
votes
2answers
175 views

How to charge the MacBook Pro from 12 Volts?

Aim: I would like to charge my MacBook Pro (MBP) form a 12V lead-acid battery. However there are no official chargers from Apple for that purpose. There exist quite some alternative products on the ...
9
votes
7answers
59k views

Battery diagnostic tool at Apple Genius Bars

I have a one-year old iPhone 5 and it's battery performance has dramatically decreased over the last few months. As I could use my iPhone for over 24 hours a year ago, the lifespan has halved by now. ...
3
votes
1answer
590 views

How to know the duration of battery usage in one session?

I would like to know how long was my battery running since it's last charge. There is a built-in time-remaining counter but I would like a time-used counter.
0
votes
0answers
39 views

W and Q keys don't respond after batteries died?

So I didn't pay attenion to the batter and didn't plugin in my macbook pro and it died. Once I turned it back on I found out the w and Q keys no longer respond. I've had this computer since early ...
0
votes
0answers
158 views

Good Quality Replacement iPhone 4S Batteries

I have a two year old iPhone 4S that's just no longer holding a charge like it used to. I purchased a "genuine replacement battery" on Amazon.com only to receive something that was pulled from a ...
3
votes
1answer
2k views

Best practises for battery/charging MBPr

I have purchased my first macbook recently and would like to know what are the best practises for keeping the battery in good condition.
0
votes
0answers
281 views

My MacBooks don't give low power notifications with Mavericks

I upgraded 2 MacBooks to Mavericks recently. Everything was OK for a week, then I started to experience power failures at low batteries on both of them. Looks like as if OS regularly 'forgets' to ...
1
vote
0answers
367 views

Dim LED on Magsafe, Macbook Pro won't boot

I have a Macbook Pro late 2008, and today, it suddenly decided to stop booting. The battery level is very low, and connecting the adapter to it shows a very dim green light on the Magsafe connector. ...
3
votes
3answers
1k views

App offering audible alarm for low battery on Mavericks?

I installed the update to Mavericks a few days ago, and while it's mostly been great there is no longer a sound that goes with the low battery warning. I have several programs which suppress the ...
4
votes
2answers
1k views

Taking battery out of my MacBook Pro

Yesterday I bought my first Mac, the new Macbook Pro 13". Apple recommends not having the battery charged connected to the MacBook if the battery is 100%. In other laptops I had, I could just remove ...
2
votes
2answers
4k views

Why does my MacBook Air 2013 wake from sleep every minute on Mavericks?

I'm having issues with my MacBook Air 2013 waking from sleep into Dark Wake every minute since I upgraded to Mavericks. Whenever it's been to sleep and goes into standby it keeps waking up. This is ...
1
vote
1answer
873 views

Macbook Pro Battery Care [duplicate]

I found instructions about MacBook battery care, but it made me confused. I received my MacBook Pro yesterday. After unboxing, I used it for some time and then I fully charged the battery. I will be ...
1
vote
1answer
515 views

Does the iPad Air stay cooler whilst charging than the previous iPad?

My iPad 4 gets quite hot whilst charging, even without a case. As I get this with every one of my iOS devices, as well as Macs, I always expect this from a device now. However, the iPad Air is much ...
0
votes
1answer
69 views

Can I replace my old model MBA battery with a 54-watt-hour lithium-polymer battery (12 hrs) for the newest model MBA?

I have a A1304 MBA and need to replace the battery with a new one. I was considering to install a 54-watt-hour lithium-polymer battery (12 hours battery life) for the newest model MBA. Is it ...