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
2answers
2k views

How can I see which processes are draining my macbook battery by percentage?

Android devices have a screen that shows you approximately what applications and processes are using your battery, by percentage. I'm wondering, in theory, can this be done on a MacBook? How do you ...
4
votes
4answers
23k 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
5answers
686 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 ...
4
votes
1answer
2k views

Magic Mouse battery level broken in Lion?

After upgrading to Lion my Magic Mouse's level indicator seems to be broken. For the whole week it was reporting solid 100% on a pair of used batteries that were about 65% before upgrading. I swapped ...
0
votes
1answer
356 views

Should I be concerned about graphics switching for battery life?

I have a 15-inch MBP, Mid-2010, 2.66GHz i7, with Intel integrated graphics and a discrete NVIDIA GeForce GT 330M. Since I installed Lion, it seems my battery life has gone down to just 2 or 3 hours. ...
8
votes
3answers
831 views

Battery life decreased after upgraded to Lion

Has anyone noticed any battery life decrease after upgrading to Lion? I'm on MacBook Pro (mid-2010). Before, on Snow Leopard, when unplugged I had minimum 5hrs of life. Now, it's not much above 4hrs ...
1
vote
4answers
2k views

After hard drive upgrade, battery not charging?

I just installed a new hard drive into my Macbook Pro 1,1. I had a little difficulty when I initially installed it because the monitor was not turning back on. After re-opening the MacBook Pro (with ...
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 ...
2
votes
1answer
529 views

Can I safely use my Macbook battery on another MacBook?

A friend needs a battery for his MacBook and I do not use my own MacBook battery, having changed to another laptop. My battery is fairly recent. Is it safe to use my MacBook battery on his laptop? I ...
45
votes
7answers
22k views

What are the best practices for battery longevity?

How do you maximize the cycle count of your battery? There seems to be a debate between: Leave plugged in 24/7 but do a full cycle once a month Charge to ~100%, drain to ~10%, repeat. NOTE: ...
1
vote
1answer
210 views

How to check if internal HDD spindle is off after unmount

I use SSD instead of optical drive in my Macbook MC516LL, so I have bunch of reasons why I wants to keep HDD's spindle off: Preserve HDD from shock Reduce energy consuming Reduce overall system ...
4
votes
2answers
4k 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: ...
2
votes
1answer
2k views

Does the new macbook air has 1000 battery cycle limit?

I know that since 2009 Apple has been advertising the 1000 battery cycles that'll last for around 5 years under normal use for Macbooks and Macbook Pros. I don't see them advertising it in the new ...
3
votes
3answers
324 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 ...
1
vote
1answer
3k views

Using the Apple Battery Charger with non-Apple batteries

The Apple Battery Charger's product description page states: The Apple Battery Charger can recharge one or two batteries at a time. It's optimized for Apple-supplied batteries and it works with AA ...
2
votes
2answers
641 views

iPad 2 battery is not draining completely

Over the last couple of days, I found that my iPad - whilst functioning as expected in all ways - is not able to discharge beyond 14%; it would simply turn off as if I had drained the battery down to ...
4
votes
6answers
11k views

Is it safe to turn the iPhone 4 off for over a week

I am going away on holiday for a week but don't want to take my phone with me because I'm afraid of running up a huge bill, is it safe to turn the phone off for this long? Or can it damage the ...
13
votes
3answers
14k views

Charging an iPhone, difference between USB port and power outlet

The power outlet has more power obviously, but maybe the computer USB is suffice to charge it at maximum speed. Is there a difference between charging an iPhone using the computer USB port and using ...
0
votes
2answers
171 views

iPhone battery runs down frequently?

My iPhone's battery runs down frequently after being fully charged, what can i do?
1
vote
1answer
336 views

How do I check if the battery has been calibrated on my Macbook Pro?

How can I check if the battery calibration has been done properly? I followed Apple's steps precisely, but I see no change in the loadCycles, or battery capacity using CoconutBattery.
1
vote
1answer
377 views

ipad charging problem

For 5 hours it only charge 10% . How could I solve this problem.
1
vote
3answers
7k views

MacBook battery/replacement battery does not work

My MacBook battery failed a few months back. For a few weeks, my computer would go to sleep a few seconds after removing the power cord. (It could be awoken by re-attaching the power cord, and it ...
6
votes
9answers
63k views

Can using a non Apple USB cable damage an iPhone?

If I use a generic/aftermarket iPhone USB cable instead of the official Apple product, can it damage the iPhone? A vendor at the mall said that high quality iPhone USB cables have a chip that ...
65
votes
7answers
101k views

Should I disconnect my MacBook Pro's power cord when the battery is fully charged?

Title says all. My friend told me that I need to disconnect the power cord when the battery is fully charged. Otherwise, I will shorten the life of the battery. Is that true? I am going to use my ...
5
votes
2answers
15k views

How do I stop automatic Bluetooth streaming?

When my iPhone connects to Sync in my Ford truck it automatically starts playing music on my iPhone. This kills the battery. Autoplay on the Sync system is off.
2
votes
3answers
10k views

iPad turned itself off and won't turn back on

I was just reading a webpage on my iPad and the screen went black and then the Apple logo came up and then the spinning loading wheel and it just went black... Nothing after that. The screen is ...
3
votes
4answers
4k 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 ...
2
votes
1answer
1k views

Indicates fully charged when not 100%

I recently (less than 1 month ago) purchased a new Macbook Pro 13". Love it so far, but have a question on the battery. It never reaches 100% - usually it makes it up to 96% then the light on the ...
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? ...
5
votes
7answers
20k views

High processor/CPU load on iPhone, draining battery, how to fix?

My iPhone sometimes gets very hot and drains battery extremely quickly. When I use the app iStat to check processor load, it shows high numbers (above 2, where it is normally 0.5, not sure about the ...
1
vote
1answer
4k views

Can iPods (3rd gen) brick completely if left uncharged?

I have an old 3rd generation iPod, barely used it since I got an iPhone a couple of years ago. I wasn't expecting the battery to hold its charge anymore (I've replaced it once or twice already, ...
25
votes
8answers
38k views

How do I debug an out-of-control “kernel_task” process?

Just recently I noticed my battery life having a pretty significant drop and the "kernel_task" process using quite a bit of CPU (a constant 1-6% on my 2.8ghz dual-core i7, 2010 MBP). Obviously I think ...
4
votes
2answers
2k views

Does constant charging harm my Macbook Pro?

I usually connect my macbookpro with the charger 12-15hour/day and 7 days a week. I'm afraid the battery could lose capacity over time. However, I believe modern electronics should be able to handle ...
9
votes
6answers
12k views

Does Google Chrome have a significant impact on MacBook battery life compared to other browsers?

I've been reading , a bit about users noticing a severe drop in battery life when using Google Chrome. I'm curious if this is a real issue - and attributed to the rendering/flash engine it uses.
7
votes
3answers
8k views

Battery on white MacBook shuts off abruptly after 30% charge is left

I have a white MacBook (MacBook4,1). I have owned and used it for over two years now (30 months, as coconutBattery would have me believe). coconutBattery and Battery Health Monitor both report that ...
3
votes
1answer
984 views

Service Battery Warning

I have a 13" Macbook Pro (2009) and I randomly get the "Service Battery" warning. I haven't noticed a huge decrease in battery life but the cycle count is at 725. I'm out of warranty, and so I'd like ...
3
votes
3answers
479 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
130 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
3answers
228 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 ...
0
votes
1answer
149 views

Have recent updates caused the iPad battery to not last as long?

I'm noticing my iPad battery seems to be going down very rapidly, even when not in use. Has anyone else seen this behaviour and what would be the most common causes?
4
votes
5answers
16k 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 ...
1
vote
3answers
3k views

Use Goal0 Nomad 7m Solar Panel to charge MacBook Air?

I've got a Goal0 Nomad 7m solar panel. It produces ~7 amps @ <22V DC on a regular day. The MacBook Air has a 45W charger. The markings on the charger say it runs at 14.5V DC @ 3.1 amps. Unless I'm ...
2
votes
3answers
2k views

Application to Monitor Battery Usage by Application

I want to know what's draining my iPhone battery. Is there an application that can monitor / estimate battery usage by application?
1
vote
2answers
713 views

iPhone 4 Battery Leaked if I Don't Charge to 100%

Related question here. I find out that when I charge my iPhone, if I don't charge it to 100% before I pull out the charger, sometimes the battery will leak out very fast. The leak manifested in ...
42
votes
10answers
77k views

Can I use 45/60/85W MacBook chargers interchangeably?

I have a 13" Macbook Pro that came with a 60W power adapter and a 15" Macbook Pro that came with a 85W power adapter. Can I use either adapter with either laptop? There seems to be disagreement in the ...
14
votes
4answers
12k views

Why won't my MacBook Pro automatically sleep?

I have my MacBook set to go to sleep after 2 minutes while on battery (via the Energy Saver preference pane.) However, when I leave it idle, it only turns off the screen—it does not actually sleep. ...
0
votes
3answers
729 views

Getting music from a dead iPod Touch

I have a 3rd generation iPod touch with a dead battery and want to get the music off of it for my new one. It powers up fine with the AC power cord but nothing with the PC's USB. Any short fix ...
4
votes
3answers
3k views

When plugged in, does the iPhone use the battery or the external source during heavy use?

I love to play games and do other tasks that quickly drain the iPhone's battery. Sometimes I'll use the phone while plugged into a power supply. Does the iPhone still use the battery when performing ...
2
votes
5answers
2k views

I think I have bricked my MacBook Pro, what are my options to get it fixed?

I have been having power issues with my MacBook Pro (late 2007?). The power cable had a dodgy connection, and kept cutting out. This destroyed the life of the battery to the point where it would only ...
2
votes
3answers
2k views

macbook pro absurdly small battery life

My Macbook Pro lasts me about 1.5 to 2 hours max on a single charge. This feels ridiculously low. What can I do to increase the battery life on Macbook Pro? Battery Information: Model ...