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)

4
votes
1answer
1k views

Macbook Pro Battery / Discrete Graphics Card Issues in 10.8.2

I am posting because I currently have a 15'' Macbook Pro (Early 2011 edition) and have suffered from poor battery life since upgrading from Mac OS X 10.7 to 10.8. Before the upgrade, I could use my ...
4
votes
3answers
2k views

iPhone 4S/IOS6 - battery drain after the camera usage

Just discovered than my iPhone4S/IOS6 draining battery too fast after I using the camera. So: after the fresh restart the phone lasts 3 days - when not taking photos or videos, but enough take one ...
4
votes
1answer
514 views

MacBook Retina strange system/battery behaviour

I am quite used to the fact, that MacOS X does a lot abracadabra internally to provide the best user experience ever, but I also used to understand all that happens. With my pristine MBPr (3 battery ...
4
votes
1answer
955 views

Is there any study on how which services/sensors consume the battery?

I am looking for some study/comparison on how battery-consuming are specific services/sensors (3G, Wifi, GPS, Bluetooth, accelerometer) in the iOS devices. Has anyone stumbled across something like ...
4
votes
2answers
3k views

Macbook Battery Cycle Count (Unibody White 2010)

I have a macbook white unibody 2010 (A1342) that is now 17 months old. I'm wondering if my battery is still good? The battery's information is below. Design Capacity: 5200mAh Current Capacity: ...
4
votes
5answers
12k views

What's the best way to test the battery life on a MacBook Air?

I just recently got a MacBook Air and noticed that its battery life is much lower than Apple's estimate of 7 hours. Since it is not the same, I would like to benchmark my battery life right now ...
4
votes
1answer
447 views

High volume battery for MacBook Pro

Can you advise me of where or if it a high capacity battery exists to replace my pre unibody battery on a MacBook Pro?
4
votes
1answer
556 views

Alpine CDE-102 keeps iPod awake until battery drains

I have an Alpine CDE-102 w/iPod cable (professionally installed) with which I use with an old 5th gen iPod Video 30gb. My goal is to just leave the iPod in the glove compartment and only remove it ...
4
votes
1answer
189 views

MacBook discharging while plugged in under load

I have the latest Retina MacBook Pro MacBookPro11,2 I quite often have the CPU at about 400%-500% usage (e.g. 4-5 cores at 100%) and also do GPU intensive tasks. While this is happening, the battery ...
4
votes
1answer
183 views

Erratic battery percentage behavior

I purchased an iPod Touch in December 2011. It came with a Target 2 year warranty. From the time I started using it the battery never read correctly. I decided before the warranty was up in February ...
4
votes
2answers
1k 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 ...
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 ...
3
votes
4answers
3k views

How to charge iPad (v1) on a Windows device

I have an iPad (first revision) and want to charge it using my Windows laptop. It doesn't want to charge and I've read quite a lot about it now (this one here amongst others via Google), but I haven't ...
3
votes
2answers
56k views

iPhone turning off with plenty of battery remaining

Lately my iPhone 4 has been getting to 19% battery and then dropping straight to 1% and shutting off. Once I plug it back in and start it up it immediately shows up at 19%. Is this a battery or ...
3
votes
2answers
1k views

iPhone/iPad battery charging/discharging cycle

Apple recommends at least one charge cycle (charge to 100% and then running it down completely) per month. Then, is it OK to charge iPad/iPhone all the time as long as I have charge cycle per month? ...
3
votes
2answers
7k views

Old iPad not charging after no use for a year

I have an old iPad and want to give it to a friend. I plugged it in with a new lead that charges another 1st gen iPad I have, but it's not coming on. It's not been used for about a year. It's been ...
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 ...
3
votes
3answers
2k views

Why my MacBook Pro 15" (2011) power adapter turns orange?

I bought an early-2011 MacBook Pro 15" (highest-spec model) in June. It's running Lion. I have a problem which happens occasionally. My power adapter (while plugged in) from time to time ...
3
votes
3answers
306 views

MacBook Pro resale value — should I replace the battery?

Non-technical question here, sort of. I'm planning on selling my old MacBook Pro on Craigslist. It's in great physical condition, with the exception of the battery, which is nonfunctional. It's never ...
3
votes
1answer
6k views

Does the MacBook battery cycle count reset when replacing a battery

I've been reading up on battery cycle counts and checked out my current count on my MacBook (13-inch, Aluminum, Late 2008) - recommended maximum cycle count is 500. I've had this laptop now for over ...
3
votes
4answers
18k views

Why does my MBP say “Not charging” when plugged in?

I have the latest 2011 Macbook Pro. Sometimes I notice that even when I'm plugged in, the battery status says "Not charging" even when I unplug it and the battery is at 35%. Why isn't my MBP charging? ...
3
votes
3answers
3k views

Does the 2011 13" MacBook Air have a longer battery life than the old one?

My understanding is that the new MacBook Air 2011 is using a new Intel CPU that uses less power. I expected that should mean either longer battery life or a lighter computer, but I can't remember how ...
3
votes
2answers
3k views

iPhone 6 charging best practices

Should I charge every night? (Assuming that I consume more than 50% during the day, but sometimes not much more.) Should I turn off the device during the charge? (Assuming that I don’t need the ...
3
votes
2answers
22k views

Battery warning “Service Battery” goes away by itself

I got the "service battery" message when clicking on the power indicator of my MBP the other day, only my battery appears to be fine. Then today, it's gone away by itself, I haven't taken it in for a ...
3
votes
2answers
11k 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 ...
3
votes
3answers
226 views

How to start with a brand new battery?

Is there a special procedure to be followed when installing a brand new battery ? Like discharging it completely, or not; leave it fully charged for a certain amount of time, etc... (It's a ...
3
votes
1answer
727 views

The Battery Life Span of iPhone 4

I found that actively using my iphone for 30 minutes will take out 5-7% of the battery. Is it normal?
3
votes
4answers
1k views

How do I stop iOS 4 from draining the battery of my 2nd gen iPod Touch overnight?

Every since "upgrading" my 2nd generation iPod Touch to iOS 4, it seems to lose power overnight (when not plugged in). What can I do to fix this? I have tried a restore and that did not work. Seen as ...
3
votes
2answers
3k views

Macbook pro doesn't go to sleep after left inactive

In Energy Saver settings (System Preferences -> Hardware section) the Mac is set to sleep after 15 minutes, but nothing happens. Mac drains battery and automatically turns off when battery is low. ...
3
votes
3answers
8k views

Out of warranty MBP ,Burned Magsafe port and frayed charger cable - repair option and cost?

I have a MBP 15" 2011 model and has is the burned magsafe port (leftmost pin melted) which i noticed today. The connector gets too hot sometimes ( but remains ok when I charge in sleep mode). ...
3
votes
1answer
4k views

Does activating Find My Phone deplete the battery on an iOS device being tracked?

My phone is currently riding around New York City under the seat of a taxi cab. I'm watching its progress with the Find iPhone app. My concern is the phone may soon die and a rider or driver will ...
3
votes
3answers
814 views

How can I keep my MacBook Air's battery cool?

It seems that the best advice for battery longevity on my MacBook Air is to keep the battery cool. It doesn't have powerful fans like the MacBook Pro, so I would think that overheating is even more of ...
3
votes
1answer
286 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 ...
3
votes
5answers
652 views

Battery life on a core i7 Macbook Air

I recently purchased one of the new core i7 Macbook Airs and in most respects its amazing. The one problem is that the battery life is far less than the "up to 7 hours" Apple claims. In moderate ...
3
votes
2answers
3k views

Any Problem in Letting iPhone 4 Battery Drop to 0?

Is there any problem if I let my iphone 4 battery drops to 0%? I remember for older smartphones, once your battery flattens out all your data is lost, because they are stored in memory. While I ...
3
votes
1answer
67 views

How many hours since I unplugged my Mac?

Mobile phones usually say this as "xyz hours on battery" by counting the time from when they are unplugged from power. Can I find out how many hours has it been since I unplugged my Mac from charging ...
3
votes
2answers
831 views

Does Avast noticeably affect battery life?

I am thinking about installing the free Avast anti-virus software on my MacBook Air (2012). Once Avast has completed its first scan of all of the files, does its continued operation noticeably affect ...
3
votes
2answers
2k views

Does iPad battery charging utility like Battery Boost Magic pro really make a difference in prolonging iPad's battery life?

Do battery charging utilities such as Battery Boost Magic pro or Kingsoft battery doctor really make a difference in prolonging the life of an iPad battery?
3
votes
1answer
766 views

Get notified when battery is charged

Is there a way to write a custom apple script or any other way to get a Alert or Desktop notification when the battery on my Macbook Pro reaches a certain percentage of charge?
3
votes
3answers
2k views

Unable to Turn off Battery Percentage Indicator

A few years ago when I had my iPhone 3GS, and wanted to see the battery displayed as a percentage (before this was implemented as a feature of iOS). I achieved this via jailbreak. Now my issue is ...
3
votes
2answers
12k views

Can I keep the MacBook Pro Retina's power-cord plugged in at all time? [duplicate]

Possible Duplicate: Should I disconnect my MacBook Pro’s power cord when the battery is fully charged? I'm wondering if it's reasonable to use a MacBook Pro Retina as a desktop replacement ...
3
votes
1answer
241 views

Why hasn't my battery life improved even though I changed the battery?

I have a mid-2009 white MacBook. About a week ago, I switched the aging and failing battery for an identical new battery I got off eBay (supposedly original part and new - looked legit both in ...
3
votes
2answers
2k views

Battery cycles for rMBP and recharges?

So I got my first Apple laptop, a Retina MacBook Pro. I heard that its best to let the laptop discharge until 0% in order to restart the battery cycle or something like that. However I know that ...
3
votes
1answer
4k views

MacBook Pro Battery Life Problems - only 2 hours with light usage

At some point in the past 2 weeks, my MacBook Pro (13", early 2011) began running hot and getting poor battery life. The battery life used to last 4-5 hours even when I was using it regularly. Now, ...
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 ...
3
votes
3answers
436 views

Battery Life on Macbook Pro

I've got a 15" macbook pro, i5 2.4ghz which I've inherited. When I use it to watch video -- with the notebooks monitor turned off, video piped to an external monitor - the battery dies in 90 - 120min. ...
3
votes
1answer
203 views

Apps using significant energy terminal/applescript

Does anyone know how to access the "Energy Impact" data used to determine "Apps Using Significant Energy" displayed in the battery menu bar? I'd like to use it in a shell-script/applescript.
3
votes
2answers
180 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 ...
3
votes
1answer
1k 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 ...
3
votes
1answer
1k views

Seems like my trackpad is never sleeping/shutting off

I'm experiencing some funny behavior with my Retina MacBook Pro and my Magic Trackpad. There are two symptoms that I believe could be related: The batteries on my trackpad drain far more quickly ...