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

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1answer
8 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 ...
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1answer
7 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 ...
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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 ...
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1answer
22 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
9k 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 ...
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2answers
2k 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 ...
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2answers
21k 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 ...
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1answer
28 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?
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1answer
14 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 ...
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2answers
57 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 ...
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1answer
86 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 ...
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1answer
39 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 ...
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0answers
42 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 ...
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7answers
13k 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?
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1answer
28 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 ...
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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 ...
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1answer
28 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 ...
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1answer
21 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 ...
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0answers
32 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 ...
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0answers
28 views

Can I replace the Macbook wall wart with any appropriately spec'd DC source? [migrated]

The inefficiency of doing a 12V -> 110V -> 20V conversion to charge my Macbook from a 12V battery is depressing, so I'm considering severing a charger connector (the part with the charging light) and ...
4
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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 ...
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0answers
272 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 ...
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2answers
40 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?
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1answer
37 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 ...
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1answer
32 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?
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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 ...
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1answer
956 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 ...
51
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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 ...
0
votes
2answers
24 views

Unused iPhone 5 not restarting

I powered off my old iPhone 5 after getting the iPhone 6 six months ago. Today, I tried to turn it on and the iPhone will not start.
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2answers
100 views

Can I run my MacBook Pro on just AC power?

I have a used little MacBook Pro 13 inch Late 2008 5,1 and I was told it needed a battery. It charges, then it doesn't, and it shuts off at the most random times, so the thought occurred to me to take ...
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3answers
4k 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 ...
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 ...
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1answer
121 views

MacBook Pro battery percentage jumping down and up

Recently, my 2011 MacBook Pro 13' produces strange instantaneous jumps in battery percentage. Sometimes, when it is discharging, it drops by ~40% (and if it was near or at less then 40%, it shuts down ...
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5answers
386 views

How to fix a Macbook Pro (late 2013 model) with liquid damage?

I bought a refurbished 13" Macbook Pro (late 2013 model retina) from the Apple store website in Sept 2014. It worked great till last month, when I had some water leak out in backpack and get through ...
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0answers
34 views

What's a normal Voltage (mV) to expect for a MacBook Pro early 2011?

I have a 13-inch MacBook Pro, early 2011 MC700. What's a normal Voltage (mV) to expect in System Report → Hardware → Power? I can see that it goes up to 12153 when it's fully charged and it comes ...
0
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1answer
58 views

What must I check after I got my new refurbished MacBook Pro 13"?

My friend wants to buy new refurbished MacBoook Pro 13" mid 2014 MGX72 in Malaysia. He's afraid of defects. So he needs advice on how to check whether it has problem or not. If it has, he must report ...
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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, ...
2
votes
4answers
49 views

No Battery Available

I have a MacBook Pro 15", early 2011. Earlier this week, I brought it home and plugged it in, and there was an X through the battery. Did an SMC reset, and it started charging again. The next day it ...
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0answers
18 views

Incoming call is not registered on iPhone if iPhone turns of before I pick up

The situation: iPhone is low on battery I receive incoming call I try to pick up and phone turns of during that moment In this situation incoming phone number is not registered on the recent call ...
2
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3answers
1k views

iPhone shuts off when battery is at about 20%

I have an iPhone 4S running iOS 8.0.2. For the past few days, my phone has been shutting off when the battery reaches around 20%. It will not turn back on until I plug it into a power source. When I ...
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2answers
33 views

Booting up gets hung up at around 50%

I have a 2008-era 15-inch MacBook Pro, with Yosemite on it. The battery recently failed and, using only the power adapter, with the battery removed, the status bar gets stuck at 50%. Is it only a ...
0
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0answers
24 views

MacBook Pro 10.6.8 mid-2011 and HP Compaq LA2205wg working only when MBP on battery

Weird behavior of MBP and external HP screen. When MBP is on battery - everything works perfect. But when power supply is connected to MBP - external HP screen is going black. "Monitor going to sleep" ...
2
votes
4answers
512 views

iPhone 4S shutting down 20-30 % - battery already replaced

I've had my iPhone 4S for 3 years and it now runs iOS 7.1 Battery was performing badly so I decided to replace it. I bought a spare battery online by duracell direct (average quality good!) ...
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2answers
997 views

Macbook Pro Retina Not Working on Battery, but fully charged and cycle count is low

I have an MBPR (15in) that is about 18 months old (no AppleCare). The battery has only 331 cycles on it, and Apple states it should last for 1000. The battery is fully charged, at 100%. If I remove ...
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0answers
40 views

My Macbook Pro says I'm connected to a power source even when unplugged

I have a Macbook Pro mid-2010 (Macbook 7,1) that is acting a bit weird. The battery status always says I'm connected to a power source even when the charger is unplugged. The battery still discharges, ...
3
votes
5answers
14k 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. ...
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votes
0answers
33 views

App to allow battery charge only to a certain extent

I'd like to charge my rMBP battery only up to 85% or 90%, in order to preserve it. Is there any app that stops charging at user selected percentages? If not, is there any other method? (Apart from ...
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0answers
34 views

MacBook Air Mid 2011 battery not charging

My battery will not charge. The ac is connected and it is a new. The green light is on. I have tried the reset. Any Help? Here is the stats:Battery Information: Model Information: Serial Number: ...
0
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1answer
38 views

Mac OS X - report time on battery since last AC unplug but exclude sleep time

Is there an app or existing command to report the battery time since the laptop was last unplugged from AC but exlude the time spend during sleep on battery? This can be inferred from pmset -g log so ...
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1answer
24 views

How can I keep my MBP's battery from charging without removing it?

My battery has expanded and has to be replaced, but I am currently writing my thesis and intend to only keep using my MBP for a few more weeks before I buy a new one. I have heard that it is dangerous ...