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

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5
votes
1answer
286 views

Have battery status only show in menu bar when running on battery power

I use my MacBook Pro plugged in to power and an external monitor 90% of the time, and thus the little charged battery indicator in the menubar is useless. However when I'm not on wall power, is there ...
6
votes
3answers
901 views

Which model of Macintosh has the longest battery life?

I was exclusively a PC man (specifically Dell, Gateway, and HP), but I am now planning to buy a Mac, because my sister has a Mac, with a battery life (much) longer than mine, and I would like to ...
6
votes
1answer
776 views

Does using a brightness reducing app save battery?

I installed the app Brightness Slider on my MacBook because the lowest brightness setting in the System Prefs isn't low enough at times. When I choose a brightness setting below what the System Prefs ...
4
votes
1answer
630 views

MacBook's battery “Not Charging”?

My original battery died. I purchased a replacement battery. While this battery DOES hold charge, when it is on the charger, MacBook still states "Not Charging." I've tried the SMC Reset, taking out ...
1
vote
3answers
5k views

What should I do if my iPod keeps saying “Connect to power”?

I have an iPod Nano (6th generation). I bought it 10 months ago. I fully charged it and it started to work. Since then, I left it 10 months without using nor charging. Now, when I connect it to PC, it ...
9
votes
4answers
6k views

Does an iPad consume more battery power when there are multiple applications open?

Does an iPad consume more battery power when there are multiple applications open compared to let's say, having only one application resident in memory? If there are differences between the ...
6
votes
1answer
331 views

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

Is there anything that could cause the battery's "cycles count" in the Power section of System Information app to report number of charge cycles greater than the actual number? I ask because the ...
3
votes
2answers
2k views

How does the new iPad's Retina Display affect its battery life?

As we all know, the new iPad has a gorgeous new Retina Display. And yet, it's advertised to have battery life just as good as the iPad 2's. How is this possible? Doesn't the new display require a lot ...
5
votes
4answers
15k views

How long does the battery last on mid-2011 MacBook Airs?

I know that one of the big innovations in the MacBook Air was in the battery (which gets most of the internal volume of the computer!) What is a normal loss of battery life (change in usable time on ...
2
votes
4answers
499 views

What's the battery life of the new iPad 4G with LTE disabled/enabled?

I saw a video about the new iPad and it showed that you could disable LTE. Apple had to increase the battery capacity in the new iPac because upgrades like LTE and the new display draw ...
2
votes
2answers
430 views

Is there a way to only enable automatic graphics switching when on battery power?

It is rare when I use my MBP on battery power. But is there a way to only enable automatic graphics switching when on battery power?
2
votes
5answers
7k views

How much time do I have left on my iPhone 4s

I just checked and it says the battery on my iPhone 4s is 30% charged. If I leave my phone off, how much time will it have left? What if I turn it off? I need to know if I'll be able to use this ...
0
votes
1answer
352 views

Why do no external iPad/iPhone batteries charge via a dock connector?

There are many external battery packs which have a USB port for charging your iPad or iPhone on the go. But they all seem to be charged via a Micro USB port themselves, rather than a dock connector. ...
1
vote
2answers
2k views

My battery is not charged. The only way to operate is to plug the computer in

My battery says 0% charge, there is no x over my battery icon. The MacBook runs fine on corded power but dies as soon as I unplug. What could be the problem?
2
votes
1answer
3k views

MacBook Pro appears to be completely dead and the charger is showing only a very dimmed green light

After doing a suspend I wasn't able to "revive" my early 2011 MacBook Pro. MBP does not respond to: power, long-power, SMC reset or even battery test button. the charger is showing a dimmed green ...
0
votes
1answer
513 views

What is the best way to charge

I'm currently using Late 2008 MacBook (Aluminum). My battery cycle is currently 111 and has went for replacement of battery 6 months ago + warrenty is ending soon. Hence I want to let the battery last ...
5
votes
1answer
6k views

What could cause MacBook battery cells to swell up?

I have a problem with my 3 year old MacBook. The battery has "swollen up" (I could post a picture if that is of help). One side of the battery is much bigger than the other. Since it no longer works, ...
0
votes
3answers
9k views

Poor battery performance after SSD install

I recently installed a Crucial SSD into my Macbook Pro (2.66 GHz Intel Core i7), and now the performance of my battery is probably about 50% of what it used to be. I've tried to reset the PRAM, but ...
2
votes
3answers
10k views

Does a black screen save battery on an iPhone 4?

Where can I found information about the power consumption of an iPhone 4 display? Which technology is used? Does it save battery lifetime when the screen displays black or dark pixels? Additionally, ...
3
votes
3answers
3k views

Faulty iPhone 4S battery - how can I test a battery to measure its integrity?

I bought an iPhone 4S two months ago. In the last couple of days I've perceived an average battery life of 12 to 18 hours with a light usage of the phone throughout the day. I've followed every tip ...
0
votes
1answer
2k views

iPhone 3GS Keeps Rebooting

My 3GS keeps having a strange issue, but I think I've found a pattern. First let its battery get low enough to where it turns off on its own Recharge it enough to come back on After coming back on, ...
3
votes
2answers
2k views

Battery issue with MacBook Pro 13 inch (Early 2011)

So, around June 2011 I finally had the chance to buy my first Macbook Pro (13 inches, i5) But recently, I've noticed something wrong with my battery! Actually with only 2 months of use, I was under ...
2
votes
2answers
18k views

Anyone knows how many mAh in iPod Touch 4th generation battery?

Does anyone know how many mAh does the iPod Touch 4th generation battery have? Seems like Apple doesn't provide this particular info.
6
votes
5answers
80k views

Why do iOS devices take such a long time to turn back on?

Often I will realise my iPhone or iPad is about to run out of battery, run around the house looking for a charging cable and plug, and get back just in time to see the screen go black and the little ...
3
votes
3answers
10k views

Can I safely charge an iPhone 4S with a 5V 2A source?

I just bought a New Trent IMP99D external battery, to keep my phone alive while gaming during long-haul flights. It has two USB ports to connect to, one which supplies 1 amp at 5 volts, another which ...
4
votes
2answers
162 views

Unexplainable large number of cycles of MacBook Battery

My battery is a year old, but it has 189 cycles. Why is this? I always use my MacBook with the charger plugged in and very rarely without the charger.
3
votes
1answer
287 views

Is switching 3G/4G off to save power a cheap trick?

Since UMTS is a lot fast than EDGE, data transfers via UMTS take less time. When downloading the same file, it would take longer to be downloaded via EDGE. Doesn't the difference in transfer time ...
1
vote
2answers
831 views

Is it normal for a 2011 MBP to display “Not Charging” while using Skype?

Whenever I use Skype, my MBP displays "Not Charging" about 95% of the time. When it is charging, it is extremely slow, gaining 1% over maybe an hour or so. Additionally, if I start using Skype on ...
3
votes
1answer
341 views

Apple Battery Charger Not Charging Sanyo Batteries

I've had the Apple Battery Charger for a good long while now. After I bought it, I also bought a couple 8-packs of Sanyo Eneloop HR-3UTGA batteries, known to be the same model of battery included with ...
3
votes
3answers
254 views

Can the clock speed of my 2011 MBAir i7 be slowed to conserve power?

Most of what I do with my 2011 i7 MBAir could be done with 10% of the available processor power. Is there a hack to slow the processor to conserve battery for the 95% of the time I don't need it?
2
votes
1answer
750 views

Does using a macbook with an external monitor damage the health of the battery?

I have an (oldish) MacBook Pro that I use with an external monitor, which requires that the MBP power adapter be plugged in all the time. Does that damage the health of the battery? I ask because my ...
3
votes
5answers
8k views

Is it safe to buy MacBook Pro batteries on eBay?

My 15" MacBook Pro 5.1 (late 2008) battery is inflating to the point of nearly breaking the unibody battery cover, so I'm really into replacing it as soon as possible. There are loads of these ...
2
votes
1answer
731 views

Is using my iPod touch always plugged in an OK thing to do?

I recently added an iPod interface to my Accord: http://www.amazon.com/gp/product/B001JT5G4G/ref=oh_o02_s00_i00_details It has two connections: the regular Apple 30-pin iPod dock cable which plays ...
0
votes
1answer
745 views

MacBook not charging

I have a 2008 Black MacBook. The battery indicator says 'Not Charging' and if I remove the power adapter it powers off instantly. I had OS X installed, installed Windows (Not bootcamp, Windows only) ...
1
vote
2answers
445 views

iPhone 4 battery questions

I have had an iPhone 4 with iOS5 for about 6 months. Is it good to wait for the battery to be almost 0% to recharge it? Is it good to recharge it to the fullest? Is it bad to leave the phone ...
2
votes
3answers
2k views

MacBook Pro shuts down when unplugged

I have a late 2008 MacBook Pro work computer. Here's the sequence of events: I fully charge the battery I unplug the Mac from the power cable The Mac immediately shuts down Before unplugging the ...
14
votes
3answers
5k views

Is a refurbished Macbook Pro's battery new?

When you buy a refurbished Macbook direct from Apple, is the battery in it new? I cannot seem to find a definitive answer on their website or on the internet. I am concerned that the savings from ...
5
votes
1answer
1k views

Is there a way to get the OSX battery icon to display both percentage and time?

I am working on a 2006 MacBook with Snow Leopard. The battery level indicator has the option to show Time or Percentage remaining. I would like to show both. Is there a way to enable this? or Can ...
3
votes
2answers
13k views

How do i get the low battery warning back on my MacBook?

I have a MacBook and I did not take care of the battery properly. It started to shut down unexpectedly at around 20% and then even at 30%. I got a new battery and it seems to work fine; it lets me get ...
1
vote
1answer
1k views

iPhone 3GS switches off randomly after update to 5.0.1

I bought a used iPhone 3GS and the owner claims it worked fine with iOS 4.3.5. When I came home, I reset all content and settings on iPhone. Did I know that doing the reset would force me to upgrade ...
1
vote
0answers
672 views

“2008 Mac Book Pro 15” Fan max speed, Battery not recognized , SMC reset makes it worse

I have a "15" Mac Book Pro 5,1 and after running it stone dead on battery once it wouldn't power on without holding down the power button, with battery and AC removed and then plug AC back in while ...
1
vote
1answer
843 views

CMOS Battery in MacBook Pro 2007

CMOS battery in my MacBook Pro (2007, pre-unibody) has died recently. I am looking for a replacement, although all I could find so far was only used batteries off ebay. It says following on the ...
0
votes
2answers
503 views

Does removing the battery while connected to power extend battery life?

On regular Windows notebooks people generally remove their battery packs when connected to a power source, in order to extend battery life. Does a similar approach work on the Mac?
8
votes
3answers
3k views

Does the MacBook Air draw power from the battery or wall socket when the battery is at 100% and plugged in?

I have a MacBook Air 13" (late 2010 model). I use it both as a portable computer (i.e. not plugged in, drawing power from the battery) and as a desktop (i.e. plugged into the wall socket) regularly. ...
2
votes
3answers
488 views

How long does it take for Apple's AA battery charger to recharge?

I'm talking about the charger that comes with their new Bluetooth trackpad and keyboard. If I put 2 empty batteries in it now, how long till they're full?
6
votes
3answers
7k views

Which uses more battery when tethering - Wifi or BT on iPhone 4S?

I'm not really bothered which is quicker - I'm guessing this is wifi anyway. I just want to know which would allow me to get the most life out of my iPhone 4S when tethering to it with may MBP. ...
0
votes
3answers
775 views

Bad battery life on iPhone 3GS used as iPod Touch

My spouse got an iPhone 4 recently and we want to use the old iPhone 3GS as an iPod for the daughter. They switched him over at the AT&T store so I don't know if the old phone has a SIM card in ...
5
votes
3answers
337 views

Should I expect battery life on an iPhone 4S to be significantly worse than on a 3GS?

I just upgraded from a 3GS to a 4s and my battery life is dramatically worse. I wasn't expecting it to be the same (though I was hoping that it might even be better), but I'm seeing a big difference. ...
3
votes
3answers
6k views

iPhone battery life is awful even after replacing it

I have an iPhone 3gs 32gb. As they do, my battery was noticeably depleting as well as conflicted with the device having been slightly water damaged (dropped in quickly but immediately turned off and ...
1
vote
4answers
1k views

iOS 5 Upgrade: Massive Battery Drain and Crashing Phone App

I upgraded to iOS 5 a few days ago. Although the installtion was a bit bumpy, everything completed successfully. However, since the upgrade, the following symptoms have occurred: Phone battery life ...