Tagged Questions

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

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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
1answer
24 views

When the apple store replaces a battery in a 13in retina MacBook Pro, do they replace the top case and keyboard/trackpad assembly too?

I ask because I have a key missing and my keyboard and would like them both fixed at the same time.
0
votes
1answer
54 views

If we run out of battery and then charge iPhone, will it turn back on?

I just called by my lawyers 133 times for some very important message. My iPhone is just 3 meters in front of me being charged. Finally my lawyer come to my apartment and we both saw that the iPhone ...
0
votes
1answer
21 views

Iphone 3GS not charging

My IPhone was on 20% last night and I immediately plugged it in to the wall, it continuously kept connecting and disconnecting and at times giving "Charging is not supported with this accessory". ...
0
votes
1answer
11 views

MacBook Pro (5,5) restarts when powering microcontrollers

My Macbook Pro (13-inch, mid 2009, Intel Core 2 Duo) has an odd problem with the USB ports. Occasionally, when plugging in, removing or restarting a microcontroller such as the Arudino or Teensy, the ...
1
vote
1answer
74 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 ...
0
votes
0answers
48 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
votes
0answers
25 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
votes
0answers
24 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
votes
0answers
16 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 ...
3
votes
0answers
72 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 ...
0
votes
1answer
19 views

Power consumption of a bash command

I want to run a bash script on my jailbroken iPhone whenever it is being charged. Currently my script looks like this: #!/bin/bash ACpower=$(pmset -g | sed -n '2 p' | grep -o '*') if [ "$ACpower" ...
0
votes
0answers
62 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
votes
1answer
72 views

Model Name: MacBook Air Model Identifier: MacBookAir4,2 Processor Name: Intel Core i7 Processor Speed: 1.8 GHz

Battery life catastrophic since upgrade to Yosemite - activity monitor shows 'spotlight web content' items using large amounts of CPU for webpages that are not even open?? Does anyone know why this ...
1
vote
2answers
60 views

How to disable Spotlight indexing when on battery?

Every time I add a few MBss of files to my SD disk, Spotlight starts eating battery (per Activity Monitor Energy Impact) for one to several days indexing them. How can I make indexing to turn off ...
1
vote
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 ...
0
votes
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 -> ...
1
vote
0answers
103 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 ...
0
votes
2answers
22 views

Does a battery's remaining power drop consistently regardless of remaining charge?

how does the remaining battery life when plugging in factor in to the overall amount of usable computer time? E.g., with a full-charged deep cell battery, a fully-charged laptop, a power inverter, ...
1
vote
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 ...
0
votes
1answer
34 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 ...
0
votes
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 ...
1
vote
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 ...
1
vote
1answer
41 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 ...
2
votes
2answers
166 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 ...
1
vote
0answers
23 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 ...
3
votes
1answer
51 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 ...
1
vote
1answer
26 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 ...
0
votes
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 ...
1
vote
1answer
73 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 ...
3
votes
4answers
5k 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 ...
0
votes
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
votes
3answers
66 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 ...
0
votes
2answers
52 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 ...
0
votes
0answers
51 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 ...
1
vote
1answer
37 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
votes
1answer
97 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 ...
0
votes
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 ...
-1
votes
1answer
116 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 ...
0
votes
1answer
30 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 ...
0
votes
1answer
76 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
votes
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 ...
0
votes
0answers
436 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 ...
2
votes
2answers
409 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 ...
0
votes
1answer
83 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 ...
0
votes
0answers
142 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
votes
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 ...
-1
votes
1answer
32 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 ...
-5
votes
1answer
5k views

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

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 ...