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

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2
votes
1answer
438 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 ...
40
votes
7answers
15k 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
208 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
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: ...
2
votes
1answer
1k 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
303 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
2k 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
562 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
5k 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 ...
11
votes
3answers
10k 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 ...
2
votes
1answer
157 views

A good iPhone 4 Battery Extender

I am heavy user of an Iphone4 and often get to the red line. I bought a Battery Extender (cant remember the name of the company) a few month back but it stop working suddenly after a month. what to ...
0
votes
2answers
153 views

iPhone battery runs down frequently?

My iPhone's battery runs down frequently after being fully charged, what can i do?
1
vote
1answer
294 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
331 views

ipad charging problem

For 5 hours it only charge 10% . How could I solve this problem.
1
vote
3answers
5k 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 ...
4
votes
7answers
17k 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 ...
50
votes
7answers
70k 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
10k 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
2answers
5k 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
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 ...
2
votes
1answer
932 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
14k 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
3k 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, ...
16
votes
6answers
28k 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
11k 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.
4
votes
3answers
4k 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
895 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
433 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
124 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
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 ...
0
votes
1answer
142 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
11k 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
2answers
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
641 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 ...
14
votes
4answers
11k 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
639 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
2k 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
1k 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 ...
1
vote
1answer
416 views

iPhone sending a lot of packets addressed to weird destinations, draining battery quickly

I have a jailbroken iPhone. Recently, I have realized that its battery usage is abysmal. Suspecting that it has something to do with the radio, I downloaded Data Counter from Cydia to check real-time ...
2
votes
3answers
294 views

iPod touch bad battery performance after updating to iOS 4

Hey, I own an iPod touch 2g which worked great until I updated to iOS4. After I did the update, it takes just a few hours for the battery to run out. Even if I´m not doing anything with it. I noticed ...
2
votes
2answers
464 views

How Many Hours of Game Playing can Iphone 4 Support?

iPhone 4 supports: up to 6 hours of 3G up to 10 hours of wifi But how many hours of game play can iphone 4 support? I've been playing Angry Birds recently and it seems to me that the iPhone can ...
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 ...
4
votes
1answer
880 views

iPhone 3GS battery oddities

I bought a 3GS in August 2009. After about 9 months I started seeing occasional precipitous drops in battery level overnight (i.e. from 50% to "dead", as in all you see is the red "charge me" icon). ...
3
votes
2answers
376 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 ...
11
votes
2answers
5k views

Should I avoid booting my MacBook if it's really cold?

As the title says; if my MacBook has been exposed to minus degrees, should I wait for it to reach room temperature before I boot it or am I just paranoid and have nothing to worry about?
10
votes
3answers
10k views

Why does my MacBook Pro die without warning?

I have a MacBook Pro (about 18mts old) which has recently started to inexplicably die without warning. I'm running it on battery and, yes, it's getting close to the bottom end (between 10 and 25%). In ...