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

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3
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82 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 ...
3
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0answers
1k views

Macbook Pro Sleep Battery Drain

I have an Early 2011 Macbook Pro (13", basic spec) which since I got it (I only just stopped to think about it) has had a massive amount of sleep battery drain. When the laptop is on and in-use, its ...
2
votes
0answers
342 views

How much will upgraded processor and RAM affect battery life?

I'm considering purchasing a new Macbook Air, and one of my main goals would be to maximize battery life. If I upgrade the standard processor (from 1.3GHz Dual-Core Intel Core i5 to 1.7GHz Dual-Core ...
2
votes
0answers
175 views

Strange sleep mode of MacBook behaviour after water damage

Months ago I drowned my MacBooks keyboard in water and it died. I'm using an external keyboard now the Mac works as before. However, there is this interesting feature that if I just close the Mac ...
1
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0answers
22 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 ...
1
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0answers
109 views

New MacBook Pro slow performance, battery not working

I have a very recent (mid-2014) MacBook Pro Retina 15" that has been working fine since I got it (about two months). Suddenly, it has begun to run very slow in all apps, even though CPU usage is very ...
1
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0answers
27 views

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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0answers
172 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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0answers
84 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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45 views

iOS: Default Battery Percentage Level for individual services to switch off

We all know iOS switches off services one by one when the battery reaches critical level. But is there any fixed battery level to cut down individual services. For example, Bluetooth will be switched ...
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0answers
404 views

iPhone heat and battery drain

In december 2013 I bought an iPhone 5s. A couple of weeks ago I restored my iPhone to 7.1.1 using a back-up on my Mac. Since then, the battery drains very quickly and the devices heats up most of the ...
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0answers
51 views

How performance of Macbook Air 13" mid-2011 battery from iFixit compares to the original one?

Please share your performance of the replacement battery as sold by iFixit (I'm interested in the New one, not B-Stock) as compared to the original battery from Apple for Macbook Air 13" mid-2011 ...
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0answers
32 views

iOS - Howto get notification email when battery is less than 20%

I wish to receive an alert/notification with email when iPad Mini battery is less are equal than 20% I use iPad mini only in public transport, not regularly. So no manual solution.
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0answers
32 views

Using old MacBook battery as an USB charger. Known adapters/cases?

I have an old MacBook with an OK battery. When I go out sailing or traveling I have a lead battery with me to be able to charge USB-things. iPhone, portable speakers, etc. The old MacBooks battery ...
1
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0answers
85 views

Does APNS work over LTE, or only UMTS/GSM and WiFi?

Over at Android Enthusiasts, we are having a discussion of what's more battery-life efficient — having APNS over GSM or UMTS networks during sleep, as TS4264 appears to indicate (thus ...
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0answers
85 views

Battery value in terminal different to battery value in menu bar

My MacBook Pro Retina is currently reporting 100% battery in the menu bar, however if I run the following command in terminal; ioreg -l -w0 |grep Capacity The following is returned; | | ...
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0answers
309 views

MBP restarting twice after going into deep sleep from a fully drained battery

Ever since I installed Mavericks on my 15" Mid-2012 MBP (4GB), I've noticed that if I let my machine completely drain to 0% and it (supposedly) goes into Deep Sleep, when I plug it back in and ...
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0answers
48 views

Can anything cause the battery “cycles count” to appear LOWER than it really is?

My Macbook battery is essentially dead. It has behaved erratically for the past 1.5 year. In any case I checked the cycle count today and found only 270 something. If I recall correctly, I had much ...
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0answers
389 views

Dim LED on Magsafe, Macbook Pro won't boot

I have a Macbook Pro late 2008, and today, it suddenly decided to stop booting. The battery level is very low, and connecting the adapter to it shows a very dim green light on the Magsafe connector. ...
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0answers
65 views

i have changed my Iphone 3g battery but it stucks on 61%

Hey guys did a search and couldnt find anything that really suited my situation. I recently changed my iphone battery, The Phone turns on and the battery decrease imediately its decrease 1% with in 10 ...
1
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0answers
91 views

iPhone 5 battery unused for 2 month

I would like to know if there is a risk for my iPhone 5 battery after remaining 2 months unused and uncharged. I'm going to re-use my iPhone, and I wonder if it stills usable for daily uses. Any ...
1
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0answers
831 views

Fusion Drive Setup: Possible to force the HDD to spin down as long as your reading from/writing to the SSD?

I'm considering to replace my optical drive in my MacBook Pro with an SSD. When using it as separate Volume, the advantage is that you can spin down the HDD, thus reduce noise and first and foremost, ...
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0answers
244 views

What's the easiest/cheapest way to replace my battery? 2009 MBP

I have a 2009 MacBook Pro (5,5). I can spend about $150 either taking it to the apple store and having them replace it or buying all the stuff from iFixit and doing it myself. Is there any ...
1
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0answers
569 views

“2008 Mac Book Pro 15” Fan max speed, Battery not recognized , SMC reset makes it worse

I have a "15" Mac Book Pro 5,1 and after running it stone dead on battery once it wouldn't power on without holding down the power button, with battery and AC removed and then plug AC back in while ...
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0answers
3 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, ...
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votes
0answers
21 views

How to make iPhone turned on after charging

I often charge my iPhone when it ran out of battery. I often postponed charging my iPhone until it really run out of battery. After I charge my iPhone, I usually go to sleep or rest or forget about ...
0
votes
0answers
14 views

iPhone 3g battery drops from 60% to 0%

My friend gave me his old iphone 3G, which I've brought to an unlock-service so I can use it using my own simcard. It works, but sometimes the iPhone suddenly stops working while the battery still ...
0
votes
0answers
55 views

Tweaking OS X 10.10 Yosemite to auto-toggle Reduced Transparency when on battery

I am curious about whether there is a way in OS X to hook to some events to find out whether the laptop is plugged into power. (And furthermore how we can control the "Reduced Transparency" settings ...
0
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0answers
28 views

My Ipad mini won't charge or even show whether it's charging or not on the screen.

Recently, my Ipad mini has had problems charging. I would have to plug and unplug the ipad several times before it charge. Today, the battery ran out and I had to charge it again. But, it won't charge ...
0
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0answers
26 views

Macbook gets power but does not charge

I have a Macbook (Core 2 Duo, 2011 model) which does not charge when I attach my Magsafe charger attached to it. However, it does not discharge as well as apparently it does get power from it. This is ...
0
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0answers
17 views

Replacement Battery for iPod Video Works temporarily

I have an iPod video that needed a replacement battery due to it not holding a charge and only working while the iPod was plugged into an outlet or computer. After the first replacement the iPod ...
0
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0answers
69 views

MacBook Air battery at 100% but shuts off when unplugged

I've been having a bit of a nightmare with my MacBook Air battery this last few months. This is my final shot at trying to solve the issue before I resign myself to needing a new machine. Machine ...
0
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0answers
11 views

power and 13inch macbook pro

may I ask something about battery and power ? I have A 13 inch macbook pro , early 2011 . MC700 . what's the normal range of Voltage (mV) that should appear in the System report -> HARDWARE -> ...
0
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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 ...
0
votes
0answers
26 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 ...
0
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0answers
25 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 ...
0
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0answers
20 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 ...
0
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0answers
52 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 ...
0
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0answers
439 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 ...
0
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0answers
147 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 ...
0
votes
0answers
34 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 ...
0
votes
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
votes
0answers
35 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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0answers
169 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
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0answers
35 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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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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0answers
70 views

What are the ways to solve my iPhone power drainage problem?

I am using iPhone 5s with iOS 7.1.1 I have a problem from 3 days ago. The battery keeps draining and the phone keeps warm in the whole day. I found that mstreamd keeps starting every minute. From ...
0
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0answers
523 views

How many times can a iPhone 5/iPad 2 be charged with Rechargeable Tyre Inflator

I am thinking about buying a Rechargeable Tyre Inflator with built in USB. Many of the devices available state the USB is compatible for Smart phone charging. But none specify what mAH total you can ...
0
votes
0answers
32 views

Can iPhone work with any rechargeable li-ion battery 3.7 V 1220 mAh in the market?

Just wondering: Does Apple make their own rechargeable li-ion battery (ie Apple proprietary battery)? or Apple used some certain rechargeable li-ion battery brand that already existed in the current ...
0
votes
0answers
65 views

Iphone 5 low battery settings with wifi

Are there any special Iphone 5 low battery settings with wifi? Today I was using my iphone and the wifi magically turned off by itself. I figured it was just having trouble finding the wifi so I went ...