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

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Estimating battery life remaining while charging in OS X

Retina Macbook Pro's battery life is amazing, and it is handy having an accurate estimate of how much longer it will last on the remaining charge, in hours and minutes. While charging however, it ...
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1answer
18 views

iPhone battery life continually worsening

I purchased my iPhone 4S on November 8th, 2013, now the iPhone first started having problems in summer, maybe in July. The phone first died at 15%, eventually the problem got even worse. The phone ...
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0answers
7 views

Battery mechanism not working on Macbook

I have a late 2008 Macbook. The mechanism for opening battery part has ceased to work. I want to put new memory in the computer. Is there anyone that could advise on how I get battery out without ...
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0answers
11 views

Mavericks: pmset ChargeInhibit

I'm running Mavericks on a mid-2012 Macbook Pro. I read that in Mac OS X 10.6 pmset could be used to prevent the battery from charging. I've been using my Mac with AC power a lot lately and I thought ...
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1answer
11 views

really bad power consumption on mid-2013 MacBook Air

I'm getting a really bad power consumption on my mid-2013 MacBook Air 11" w/ OS X 10.9.4. I think the issue is that I have too many tabs open in Safari and SeaMonkey, and they're all taking a lot of ...
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25 views

macbook air won't charge [closed]

first of all sorry or my english. So i first had a mac book pro that didn't want to charge, i had to put a little box under the charger so that it moved the charger only then it would charge. i sold ...
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1answer
27 views

Does Macbook Air (mid 2013) bypass battery after it's charged?

I have a MBA mid 2013. I was wondering if a MBA is plugged in charge, does it bypass battery after it's fully charged? Because while I am working it's always plugged, I wonder how this will affect ...
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2answers
95 views

iPhone 4S iOS 8.0.2 Shuts off when battery is at about 20%

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 plug it in, it automatically powers ...
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18 views

Maximizing iPhone Battery Life [closed]

Regard maximizing iPhone Battery Life, just for my curiosity and knowledge, from a software or hardware standpoint why when we use the iPhone to access data, a Wi-Fi connection uses less power than a ...
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1answer
33 views

Understand iOS Low Battery logs

Good morning everyone. I'm kinda new to this site but I see there are many expert opinions, so I would submit to you my question, hoping it will be helpful for someone else. Before proceeding, I beg ...
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1answer
16 views

Concatenating date and cycle count to file on startup

I have the following code from here to find the cycle count of the battery on my computer: system_profiler SPPowerDataType | grep "Cycle Count" | awk '{print $3}' I will enclose it in a simple app ...
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18 views

Does iOS battery usage include GPS usage?

One of the most common pieces of advice given to reduce battery usage is to disable un-needed GPS features. This is becoming increasingly hard to do as many features such as activity tracking and ...
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2answers
55 views

Battery life Macbook 13 Retina mid 2014

I got a new MBP 13 Retina display, mid 2014. I get on the battery up to 5 hours at most. Is this normal? This is my first product from Apple so I do not know if this is as supposed or I got the wrong ...
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4answers
2k views

What is the relevance of “Low Signal” in battery usage stats?

iOS 8 shows "Low Signal" in the battery usage stats, like here: How great is the effect of signal quality on battery life? In other words, if the signal quality was better, would the stats be more ...
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0answers
14 views

Macbook Battery calibration craziness

As explained at this Superuser question, I've bought a generic battery for my 2008 Macbook but didn't need it. Based on the answers, I've decided to use my new battery and proceeded to try to ...
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3answers
60 views

Mac book: Is battery cycle low means mac book still can be used at long time ?

I try to buy an old mac book pro mid 2012. Old user of this mac uses mac by electric all the time, so the life cycle till now just 3 cycles, but this computer has been used for 1.5 years. My question ...
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2answers
35 views

Revive Li-Ion Battery White MacBook (2006)

I have a White MacBook (2006) with a new battery (2013) that I accidentally let sit discharged for too long (a few weeks). Now the battery doesn't work. If I leave the battery in the laptop while ...
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0answers
36 views

Does the “Battery Doctor” technique make sense?

On my iPhone I've downloaded the application "Battery Doctor" (https://itunes.apple.com/gb/app/battery-doctor-master-battery/id446751279?mt=8) which makes you charge your phone while their application ...
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1answer
34 views

I Have A 2013 MacBook Air that refuses to charge. I continue to use it once it says that it has no charge left. What do I do?

I received this brand new laptop yesterday and today the charger isn't responding to being plugged in. (The lights aren't flashing as they should be). The battery icon on the upper right corner has a ...
2
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1answer
67 views

In-store iPhone 5 battery replacement?

I have an iPhone 5 that's eligible for Apple's battery replacement program. I haven't actually had any trouble with it, but I suppose I should take advantage of the offer before it expires. There are ...
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0answers
7 views

What behaviour should we have against batteries of a Mac? [duplicate]

I have read this general post where some people give some suggestions about the behaviour we have to adopt against the batteries of laptops. People, for example, don't suggest to remove the cable of ...
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1answer
51 views

Battery life of macbook air with different hardware configuration

Apple states that the 2014 11-inch MacBook Air has a battery life of 9 hours and the 13-inch model has a battery life of 12 hours. These stats are for the default configuration: Processor: 1.4GHz ...
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1answer
25 views

iPod classic battery life

I have an iPod classic and tend to keep it plugged into a mains charger while playing music up to 4 hours a day. Will doing this damage the battery? Is it better to use all the battery power and ...
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1answer
43 views

Battery replacement on MacBook Pro 13" Early 2011 considerations

I need to replace battery on MacBook Pro 13" Early 2011 and I've already found the one in the local shop, but I am not sure it will fit. Old non-working battery has the following parameters: Model ...
0
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1answer
18 views

Installed a new LCD screen on iPod but concerned to charge

As stated, I just installed a new ipod touch 4th generation LCD. As many youtube tutorial layout I went ahead after installing my LCD to power on the screen. However, here is my dilemma, the battery ...
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0answers
348 views

Iphone 5 Panic IPS After Changing battery

First I will like to say sorry for my English that it’s not the best In the world. I have a problem with my Iphone 5, its all begin in the moment that I put my phone to charge after that I realize ...
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2answers
263 views

Macbook power adapter issue: PPP003

I'm using Macbook Pro 15" Retina Late 2013. OS is Yosemite Public beta. Once in month I usually do diagnostics (Apple's boot time diagnostics, the when you press "D" ). The last the when I did it, I ...
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1answer
55 views

MacBook Pro - Only runs while MagSafe charger connected

My 2013 MacBook Pro only runs while the MagSafe power charger is connected. Model Number: A1425 (EMC 2672) When the charger is disconnected system immediately powers off (no shutdown). MagSafe ...
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0answers
89 views

MacBook Air randomly “dies” on a full/near full battery

Since the beginning of the month, I've had a strange issue with my 2010 MacBook Air (2.13 Ghz, 4GB Ram, 128 GB SSD). It will run fine when plugged into the MagSafe, but running on battery it'll ...
2
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1answer
25 views

I have a MacBook (2008) that sleeps as soon as you put in a battery

This MacBook runs perfectly without a battery. Putting in a genuine new and aa genuine used battery does the same thing. The screen goes dark, you can still see the screen for a second and then it's ...
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1answer
27 views

Macbook battery problem

I have a MacBook 13" (A1181) running Mac OS X 10.6.8, I have a problem with the battery When its turned off it responds to power button only when charger plugged in. After starting i can remove the ...
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1answer
3k views

IPAD MINI WONT TURN ON!!! even after charging and it doesnt show a battery symbol

Ive got an ipad mini, and it is completely dead. I mean dead as it doesnt come on at all even if i charge it over a day. It doesnt even show a battery symbol when you turn it on. ive tried all the ...
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32 views

Battery Dead or Normal

I have an unusual problem. I have an 11" MacBook Air (Mid 2011). I am only able to use it via the power adapter although no light on it of any colour at all. When I check the battery in System ...
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0answers
127 views

Disparity between “Charge remaining” and “Full Charge Capacity” on relatively new MacBook Pro?

I have the latest retina MacBook Pro. While looking at some statistics, I saw the following: My computer is currently on 100% charge (charger is plugged in), and it seems odd that the difference is ...
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1answer
112 views

Are my battery cycle counts increasing when MBP is on and plugged in?

I often leave my Macbook Pro (13" - Late 2011) plugged in while working on it with the charge at 100%. This post suggests that when the battery is at 100% and the laptop is plugged in, the battery ...
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1answer
43 views

What is the ideal charging behavior for a new Retina MacBook Pro? [duplicate]

I've called Apple Support a bunch of times, but I got conflicting answers. To my knowledge, new technology makes it okay to keep the charger plugged in non-stop, but I want to make sure I am properly ...
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1answer
43 views

How's battery life of the Oct 2013 Macbook Pro 15" Retina?

I am using a Mid-2013 MacBook Air 13" and the battery life is great! Now I am considering upgrade to a bigger screen and is checking a refurbished Oct 2013 MacBook Pro 15" retina. Everything seems ...
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1answer
37 views

iOS device battery life when developing

I have an iPhone and an iPad that are constantly connected through USB to my MacBook Pro 8 hours a day. The battery of both device is always at 100%. Will this hurt my devices battery life? I've ...
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0answers
75 views

Battery Life on MBPr (2014 model) with*out* dedicated GPU

I am considering to try MBPr (late 2014 models) coming from Windows environment, which means that I would still need to use Windows about 50% of the time. One of the strong points in favour of MBPr is ...
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1answer
102 views

How to test a Macbook Air battery hardware integrity

I spilled water on my Macbook Air last week. The technician had to remove the battery because it wasn't charging. Without battery, the computer runs fine. I'm thinking of purchasing another battery, ...
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0answers
22 views

do i have a bad battery or macbook?

I have a 2007 17" MacBook pro and the battery stopped holding a charge. I did not have enough money to buy a apple one so I bought third party battery. The battery will charge to full capacity and the ...
0
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3answers
465 views

I have a mid-2012 MacBook Air, and the Service Battery alert is showing

My 13" Macbook Air recently started showing the "service battery" alert. It's the mid-2012 model, and is still under Apple Care. The alert seems to appear mainly when I'm running off the battery. Is ...
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1answer
86 views

Mac does not sleep

There is a week or so since my macbook stopped being able to go sleep, instead it stops by just sleeping the screen, while the system light does not go blinking (and the system won't go sleep either, ...
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1answer
46 views

new iphone 3gs dead battery

i bought a new sealed iphone 3gs from vodafone store ( yes brand new one, it seems that they got some stored old phones of different brands and models ) the problem is that this iphone wont charge by ...
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0answers
24 views

Why does my iPhone 5 refuse to turn on at a different level to my iPhone 4?

When iPhone 5 (A1529) shuts down when it's low on power and refuses to start which is expected, however when i plug it into power it starts up right away have 11% battery so i'm assuming it shut down ...
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127 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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27 views

Macbook Air battery power = 0, odd sleep / shutdown hybrid

Does the macbook air go to sleep or shutdown when battery power is used up? Mine does something in-between... screen goes black on battery = 0%, and when plugged back in, it doesn't go through a boot ...
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2answers
157 views

in terms of battery life for the iphone 5, which battery is better? 3.8v1440mAh or 3.8v1560mAh?

ok so if I have this right milli Amp hour= mAh, Whr = Watt hour, and v = Volt is charge capacity? Where is potential discharge or work capacity and V is the rate at which the "work" is being done?
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0answers
32 views

Second battery failure

I replaced my battery on my mid-2010 13" MacBook Pro less than a year ago, while it was still under AppleCare. My new battery is now telling my computer to give me the "service battery" indicator. Is ...
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1answer
22 views

Battery Issue - Low level issue

I have installed Xubunto instead of Machintosh on my MacBook Pro machine, when i close the screen the apple lamp on the back of my laptop doesn't goes off, and the laptop runs out of power. how can i ...