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)

3
votes
5answers
6k 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
286 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
2answers
869 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
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
19k 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
4answers
13k 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
221 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
707 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
674 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
1answer
3k 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
624 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
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
1answer
274 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
617 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
5answers
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
2k 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
46 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
575 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
1k 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
461 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
1k 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
1answer
211 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
3k 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
396 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
112 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
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 ...
3
votes
1answer
869 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
581 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.
3
votes
2answers
459 views

MacBook Pro: OS battery indicator doesn't match hardware battery indicator

I recently upgraded my MBP to Lion, and now the battery indicator in the menubar at the top of the screen constantly shows "(Charged)", even when the indicator on the side shows almost empty. Any ...
3
votes
1answer
275 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
3k 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 ...
3
votes
3answers
937 views

Hibernate MacBook on 10-ish % power instead of 0/1% when running on battery?

Yeah, I know my battery is probably hosed, but every time I reach 5%, my MacBook shuts down, as it expects the battery to be able to run down to 1% before hibernating. However I would like it to ...
3
votes
1answer
3k views

iPhone battery symbol is red, doesn't acknowledge charging, but is apparently charged

I have an iPhone 3G, When I plug in the charger, the big red battery on the locked screen is red, low and doesn't appear to be charging. When I unlock the screen, the small battery symbol on the ...
3
votes
2answers
287 views

What is Best Practice when storing MacBooks for over a month?

We have a pod of 30 MacBooks and MacBook Pros that don't get used over the holidays. What's best practice to store the laptops for 6 weeks? I know that when you store laptops for long periods at ...
3
votes
2answers
609 views

MacBook Air Battery is not charging, no light, still be able to power up, battery condition is normal

I experienced this behavior two days ago (My MacBook Air is late 2011 version (4.2): I can still power up my Mac, with or without MacSafe charger connected Battery is not charging There is no light. ...
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.
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 ...
3
votes
1answer
842 views

Dilemma about replacing the battery in my 17" MacBook Pro mid-2010

After 3 years my mid-2010 17" MBP model is telling me it's time to replace the battery. The current one (model A1309, FWIW) has had ~1000 cycles now and can't hold the charge reliably anymore. Being ...
3
votes
4answers
4k views

Retina Macbook Pro now has faster battery drain

I have disabled Hibernation mode and Deep Sleep mode, I also keep the charger plugged in about a week before removing it if I want to go somewhere with the laptop. I don't know if this is normal, but ...
3
votes
1answer
906 views

Problem with applications not resuming where left off after low-battery sleep/hibernate on Lion

I am having problems with applications re-launching from scratch, rather than continuing where they left off, when resuming my Mac (alumimum MacBook, fall 2008) after its battery runs low. This ...
3
votes
2answers
1k 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 ...
3
votes
3answers
5k 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 ...
3
votes
3answers
214 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?
3
votes
1answer
118 views

iPhone 4 “A Series” battery?

I was just about to order a replacement for my iphone 4, when I noticed there are apparently two different types. Both are claimed to be genuine apple batteries, however one costs nearly 10GBP more ...
3
votes
1answer
40 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 ...
3
votes
2answers
168 views

How can I reset the service battery warning?

I learned from one of my other questions that the "Service Battery" warning will limit your CPU power and slow your computer down - this is a problem I've been having with my MacBook Pro. I have 906 ...
3
votes
0answers
68 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 ...