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

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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 ...
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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
148 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 ...
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0answers
244 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 ...
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1answer
39 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 ...
3
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1answer
896 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 ...
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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 ...
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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 ...
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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 ...
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2answers
352 views

Poor battery performance on MacBook Pro

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 ...
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0answers
17 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? ...
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3answers
235 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 ...
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1answer
17k 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
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1answer
796 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 ...
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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 ...
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0answers
31 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
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2answers
481 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
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2answers
203 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 ...
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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 ...
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2answers
685 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 ...
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1answer
160 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 ...
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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 ...
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2answers
149 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 ...
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6answers
54k 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
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1answer
499 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.
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0answers
38 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 ...
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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
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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.
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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 ...
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0answers
365 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. ...
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2answers
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 ...
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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
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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 ...
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1answer
767 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 ...
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1answer
509 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
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1answer
67 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 ...
0
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2answers
364 views

Battery charge suddenly drops to 0% even when plugged into mains (Mid 2009 15″ MacBook Pro)

My mid-2009 15″ MacBook Pro (A1286) has developed a nasty habit in the last couple of days. It suddenly discharges its entire battery without warning, and won't start until it's had about 10 minutes ...
2
votes
3answers
778 views

Will not using battery in MacBook make it last longer?

If I don't use my MacBook on a battery, does it mean that it will last longer? I heard that when you have normal notebook from HP, Asus, Dell, Acer.... no matter if you use the notebook on battery or ...
2
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2answers
332 views

5 minute battery life

I have a Late 2011 Mac Book Pro 15" and recently the battery has very quickly gone from several hours of battery life to all of a sudden only apparently having 5-10 minutes and by quickly I mean ...
3
votes
1answer
125 views

MacBook Battery charging

I recently bought a replacement battery for my MacBook battery. In Coconut Battery the Current charge has been as high as 8000 mah, yet the maximum capacity is listed as 6100. When the battery icon ...
0
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2answers
175 views

Keeping battery charged at certain level

I keep my MBA 2013 plugged in most of the time. AFAIK for a long term it is better to keep modern battery around 40%. I have seen that some other laptop manufacturers added feature to their drivers to ...
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1answer
90 views

does these battery stats are reasonable for rMBP? (max charge 98% after 25 full cycles)

I have my rMBP for 14 months, during the first month I barly used it and it was off most of the time. today I'm connecting it to a display (unfortunately the fonts are blurry!) and the lid is closed ...
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1answer
412 views

iPhone 4S iOS 7 Battery Drain

I have an iPhone 4S with iOS 7.0. Since the upgrade, my battery drains twice as fast. I have applied all the battery saving tips available on the internet (e.g. ...
3
votes
1answer
4k views

Does Battery Usage/Percentage need to be calibrated again?

I recently installed iOS 7 on an iPhone 4S. Does the Battery Usage/Percentage (as shown in the top-right corner of the screen of the phone) need to be calibrated again (by letting the battery fully ...
0
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0answers
192 views

Has anyone had troubles with an iPhone 4's battery life failing after upgrading from iOS 6 to iOS 7?

After I upgraded my iPhone 4 from iOS 6 to 7, I have experienced my phone running out of power before the end of the day on a night charge (I know it's easy to run a full charge down during the day if ...
2
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1answer
143 views

How the low battery message graphic is loaded?

When your iPhone battery is "almost" dead, it turn off, and then if you want to turn it on again it loads this very informative graphic: The problem is that when you turn on "power button" this ...
2
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1answer
82 views

Unsold iPhones & Battery Life

There is a lot unsold iPhones 4s on the Apple Store. According to the "About iPhone Batteries", iPhone's battery should be regularly charged. But in case that the battery is not charge after the ...
5
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2answers
3k views

What's the difference between the battery of iPhone 5s vs iPhone 5?

Do they have the same capacity and/or run time for certain identical tasks? I know iPhone 5's battery has a charge capacity of 1440mAh. Has this been improved in the new iPhone 5s and/or iPhone 5c?
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1answer
676 views

Macbook air 13 2013 in battery drain issue

This is the second time that battery is causing issue. Initially after I bought I gave it to apple service and they reinstalled OS and suggested VirtualBox was causing the drain so I did not install ...
8
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1answer
21k views

How can I assess the health of my iPhone 5 battery?

I suspect my iPhone's battery is now much worse than it used to be. How can I assess this? Is there some kind of test I can make, to compare it with Industry average? How long can I reproduce a ...