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)

0
votes
1answer
9 views

MacBook shut down at 20% battery with no warning?

My 2013 13" MacBook Retina (OS X 10.10.3, Yosemite) shuts down when I have about 20 minutes of battery left. Not sleep, full shut down. It does this with no warning at all. I seem to remember ...
1
vote
2answers
16 views

What specifications does my iPhone 5c require to charge?

I'm looking into portable battery packs and I was looking into the electrical specifications of the pack. This got be thinking what current and voltage does my 5c need to charge?
0
votes
1answer
16 views

Unusual problem regarding old water damage, new battery not charging macbook air mid 2011

I have quite strange problem. I had some water damage on my computer few month ago. After it dried completely computer worked only when I unplugged the battery but if I unplugged the charger my ...
4
votes
3answers
10k views

My MacBook Air won't charge

My MacBook Air won't charge, the MagSafe doesn't even have that green or red orange light and when it does it isn't very bright. The Battery Icon on the upper right corner indicates not charging. ...
1
vote
1answer
27 views

Would the battery from a 13“ MacBook Pro (2010) work in a 15” MacBook Pro 2011?

The battery of my MacBook Pro 15" (early 2011) died recently and I happen to have the battery from a 13" MacBook Pro (2010) handy. Does anyone know of any reasons why this battery would not work? ...
0
votes
2answers
89 views

How do I extend the lifespan of my MacBook's battery (2015 Retina Model)

I have just received my 2015 Retina MacBook. I would really like the battery to last long. Is there anything I can do to extend the battery life because my retina MacBook Pro's battery got ...
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?
0
votes
1answer
66 views

I know my battery should be replaced, but is that all of the problem? (Update)

Updated: I am using a MacBookPro8,1 with non-removable battery. Recently that battery charging status was Replace soon. But it was working fine and kept enough charge for my daily works. So I didn't ...
1
vote
3answers
4k 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 ...
2
votes
3answers
8k views

My MacBook Pro is not sleeping when I close the lid on battery

I purchased my macbook back in 2011, and this problem just started. When I unplug and close my computer to put it in my backpack for school, it does not sleep. I take it out and its very hot and has ...
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 ...
0
votes
0answers
54 views

iPhone 5s is draining battery really fast like 2-3% in a minute

I have taken all the measures which can fix battery life for example turning off location service, disabling push notification etc. My iPhone is updated to latest version i.e 8.3 and i have even done ...
0
votes
0answers
27 views

Testing an iPhone 5C without a battery or screen

I have a previously broken iPhone 5c that I removed the offending parts from. The screen was shattered beyond repair, and the battery was in pretty bad condition. I'm planning to buy some new parts ...
0
votes
0answers
32 views

iPhone 5s iOS8.3 battery indicator fritzing

I noticed today that the battery indicator on my almost 6-month old iPhone 5s was giving me inaccurate readings. Throughout the day, it was draining normally until it reached 20%. As soon as it ...
3
votes
1answer
1k views

iPhone: What is `accountsd` and why is it using 80% CPU?

I just got a new iPhone 6 for my SO and noticed that it is quite toasty to handle with the battery draining quite fast. It has been 24 hours since I first set it up. I plugged it into Instruments ...
2
votes
5answers
3k views

Macbook Air - battery drains while sleeping (but not when shut down)

My macbook air (13-inch, mid 2011) battery drains from ~100% to ~85% over night. The problem only started a few months ago. I'm currently running yosemite, but the problem started while on ...
7
votes
4answers
16k views

Does overcharging a MacBook degrade its life?

I have an early 2011 13" MacBook Pro and I use it almost like a desktop. I leave the power cord connected all the time. Is this OK? Am I ruining the computer or diminishing its lifespan?
17
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 ...
1
vote
3answers
7k views

Why is my iPhone 5S overheating so much?

Activities such as: Phone Calls that last around 10 minutes 3G Browsing for 5 - 7 minutes Watching videos for 5 minutes Using apps such as facebook / instagram etc for 5 - 7 minutes, lead to my ...
3
votes
5answers
16k 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. ...
0
votes
0answers
52 views

Calculating battery capacity (in mAh not percentage) without removing battery

Phone batteries wear out over time, having less and less capacity to store energy. The iPhone keeps a counter of battery cycles or charges, but this does not speak to the issue of battery capacity. ...
1
vote
0answers
76 views

Low Battery Crash with no Battery Usage on ipad 2 with ios 8.3

My iPad 2 has been crashing recently with no warning and then takes several hours charging before it comes back to life. When it crashes there is only a low battery icon, and no charging symbol when ...
0
votes
0answers
17 views

Charger Help what do i do?

My brother just bought this iPhone 4 (black) online from eBay and for a month it was perfectly fine. Then he gave it to me and on my third day with it, it wouldn't charge when I woke up. The phone is ...
0
votes
6answers
2k views

Iphone 4S 8.1.1 Battery Problem

What else can I do to make my iPhone 4S work for as long as possible? I have done all the "standard" battery saving techniques recommended on most sites, like: turn off background app refresh, ...
0
votes
2answers
40 views

Is safe battery replacement for iPhone 5?

My iPhone 5's (bought on January 2013) battery life is now something about 5-6 hours. I found some possibilities how to buy new battery and replace it. Does anybody have some experiences with this ...
11
votes
5answers
49k views

How to maximize Macbook pro retina's battery life when working with AC power?

I'm working 95% of my time with AC power and Thunderbolt Display. Since macbook pro retina's battery are no longer easily switchable I'm concerned about it's life and would like to maximize it. Before ...
-3
votes
0answers
19 views

How do I maintain battery count cycles

I own a MacBook Pro early 2015 model since last month and my count cycles are 26 and battery health is 98.x%. I am a bit worried because I saw a video on youtube which showed that the guy was having ...
1
vote
1answer
13 views

Swap Batteries MacBook Pro & MacBook Unibody

My MacBook's (late 2008, unibody, 13") battery has just become very bad. I also have a MacBook Pro (mid 2012, 15") which has a still-ok battery. Now, since I take my MacBook (the old one) everywhere I ...
1
vote
1answer
21 views

Can I use a Early 2011 MacBook Pro 13“ charger with my Late 2013 MacBook Pro 13” with the MagSafe Adapter?

I bought a Early 2011 MacBook Pro 13" but eventually upgraded to a newer Retina Late 2013 13" model. I'd like to get another charger, but I'm curious if I could use the old charger that came with ...
1
vote
3answers
3k views

Is there an iOS app that measures/reports the battery charging current?

I suspect my fake lightening cable charge my iPhone 5 much slower than my original lightening cable on the same charger. Is there an app that will display the current battery draw/charging current and ...
0
votes
1answer
26 views

iPod less than 1 year old battery life

My less than 1 year old iPod touch (A1421) lasts about 8 hours with no use other than listening to podcasts. Is this level low enough to justify an in-warranty battery replacement? If so, do I ...
4
votes
3answers
10k views

Difference between autopoweroff and standby in pmset

I just got a new Retina MacBook Pro 15". After getting some downloads interrupted due to the computer going to sleep (even on AC power), I started looking at the man page for the pmset command. I did ...
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 ...
0
votes
1answer
36 views

Brand New Macbook Pro 15" Battery

I just bought a brand new 15" Macbook Pro (mid 2014) and it came with already 2 battery cycle counts, is that normal?
0
votes
1answer
30 views

iPad plugged to charger turns off due to low battery

My iPad is connected to charger yet battery level decreases (not as fast as plugged off but still). Is it a fault that can be directed to Apple Support for warranty or normal behaviour? I though that ...
2
votes
2answers
61 views

Is it harmful for the battery to use a 60 W instead of 45 W charger?

So, my dog bit through my MacBook Air charger and i just ordered one online without really knowing what all the specs meant. Now my question, does it hurt my battery to use a charger with a higher ...
3
votes
1answer
88 views

What does “main screen” actually refer to, in battery usage?

On iOS 8, there is the battery usage screen showing an estimate of the battery use, per application. It also has an entry for "Main screen". I assumed it was just displaying the main screen with the ...
0
votes
1answer
59 views

Is there a way to find out information on battery through macbook serial number?

i bought my MBP Retina display 13"(late 2013) 5 months ago; a week ago i had to change its battery at an authorised reseller when my small sister accidentally dropped a whole glass of water on it. i ...
2
votes
0answers
43 views

Why is my rMBP drawing twice as much power as my friend's when idle?

Mine is late 2012 and has 8GB RAM. His is late 2014 and has 16GB RAM. Both have an SSD (although of different size) and both are running Yosemite. We set the brightness to 6 pips each and turn off ...
44
votes
7answers
16k views

Is charging iPhone all night harmful to my iPhone?

I normally charge my iPhone all night to get 100% power, does this charging way harm my phone? Or, specifically, phone battery?
1
vote
1answer
38 views

How to prolong battery life

I have recently brought my self a MacBook Pro (2015) battery life because I was getting 4 hours or less on my MacBook Air (2010) that had about 800-880 cycle counts. Because of the battery issue with ...
1
vote
1answer
46 views

What does an Apple “battery service” involve?

I've got a mid-2012 13 inch MacBook Air that I've owned since new. Quite soon after I bought it, the drop-down menu that appears when I click the battery icon in the menu bar included the item ...
0
votes
1answer
37 views

Power adapter green light blinking on - non genuine adapter

I recently acquired a new power adapter 85W for my macbook pro retina late 2013. I made sure the specifications matched the official Apple adapter and in fact I have not noticed any performance ...
0
votes
0answers
66 views

New MacbookPro 13 Retina MID2014, temperature issues

Bought this Mac two weeks ago, and I used to have a MacbookAir. I believe in my MacbookAir the battery temperature usually stayed around 30 Celsius while using it, even heavily. With my new Macbook ...
0
votes
0answers
276 views

My charger for my white macbook isn't charging

I was actually on my macbook like a few days ago and the charger was working GREAT. However a few days later like 3 more days later it stopped working. It was a LIGHT green and then it would get ...
0
votes
2answers
47 views

What does (10 hours)² mean? (specifications)

I was looking at the specifications of the MacBooks (pro) on Apples website and I saw this. Built-in battery (10 hours)². What does the '²' mean? Why (10 hours)² and not 10 hours?
0
votes
1answer
44 views

IPad Battery replacement criteria under warranty, no applecare

does the complimentary one year warranty cover replacement of batteries that go below 50% of original capacity? What is 50%...? Like how fast does it have to drain? Is there a way to measure without ...
0
votes
1answer
39 views

Difference between Express and Standard Replacement Service for iPad battery

Can a user use Express Replacement Service to get a new battery if still under warranty? How's that different than Battery Replacement Service again under warranty?
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 ...
1
vote
1answer
977 views

An ipad app or setting that helps turn off wifi or turn on airplane mode on schedule?

i hope to conserve battery at night. is there an ipad app or setting that helps turn off wifi or turn on airplane mode at certain time? or would it even be better to have an app that turns off the ...