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
28 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 ...
0
votes
2answers
48 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 ...
2
votes
4answers
34 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 ...
0
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1answer
42 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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0answers
10 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 ...
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0answers
8 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" ...
1
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2answers
21 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 ...
1
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0answers
36 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, ...
2
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0answers
28 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
27 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
25 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 ...
1
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1answer
23 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 ...
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votes
2answers
37 views

how to turn on empty iPad while loading?

How do I turn on an iPad (first revision) during it is loading. Or how do I turn it on at all? When I plug it in, the display shows a battery symbol with a little bit of red juice on the left side ...
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0answers
54 views

Resetting SMC on a Macbook Pro

About a couple of weeks ago, I tried turning on my Macbook Pro and it seemed completely dead. I plugged in the power cable but it still didn't work. Since it's not under warranty anymore, I opened up ...
0
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2answers
47 views

Accessing Apple Hardware Tool on MacBook Air 2010 running Yosemite

I charged my MacBook Air (Late 2010) up to 100% charge overnight however my battery died within 1 hour. Because of this I want to use the Apple Hardware Tool (AHT) to diagnose the issue. My Mac is 4 ...
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0answers
33 views

1.7 GHz Intel Core i5 10.7 Macbook Air Water Damage… still works… Battery issue

While on a flight in June 2014, the guy next to me put his drink in the gap between the tray and his cup spilled liquid below including on my macbook air which was in the pouch. Unsure of whether ...
2
votes
0answers
67 views

iPhone 4S 64GB not charging unless switched off

My iPhone is simply not charging unless I switch it off while it is already plugged in. I suspect it to be a software problem, as when its off it charges. Windows does not seem to recognize the device ...
0
votes
1answer
18 views

MacBook shows it is charging when MagSafe is green

My MacBook currently shows this even though the MagSafe charger has a green light. Does anyone know why this is? If it helps I am on a MacBook Air late 2010 with 819 cycle counts, 4,995mAh ...
0
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0answers
33 views

iphone 4s won't hold a charge

I updated my iphone 4s operating system to 8.1.3 , now the battery drains from a complete charge in about 5 to 6 hours on stand-by. I replaced the battery with a battery I purchase online. I thought ...
1
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1answer
55 views

Magic Trackpad stuck battery

I have a Magic Trackpad that sat unused in a work drawer for a few months. Like a total noob, I neglected to remove the batteries. I recently reconfigured my workspace and decided to start using ...
1
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0answers
58 views

Macbook pro mid-2010 randomly turns off?

This has been happening for around 6 months and it has gotten worse. I thought it was the battery because it had close to 1500 cycles. But I recently replaced it and now the problem seems worse. The ...
0
votes
1answer
91 views

Macbook Pro low battery warning to instant recharge

My Macbook Pro (Mid 2012, OSX 10.10.2) sometimes gives the Low Battery warning, then immediately after dismissing the notification the battery pops back up to about 25% battery, still showing a red ...
2
votes
1answer
339 views

iPad won't turn on after a complete battery drain

I forgot to plug in my iPad after the critical battery warning and it went some minutes following the warning. I was not worried because same thing had happened a few times before and iPad was ...
2
votes
5answers
274 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 ...
1
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2answers
31 views

Old iPad not charging

Old ipad charging indicator comes on but doesn't hold a charge. Doesn't build charge either? Any suggestions already tried cable and new transformer.
2
votes
1answer
38 views

Battery issue - backup problem?

I recently bought a new iPhone 6, because my iPhone 5 had some weird battery issues: when I was on 3G or 4G, the battery would literally go down from 50% to 10% in like 10 minutes. On the Wi-Fi, it ...
0
votes
2answers
37 views

Why is there a pause before the light comes on/mac starts charging when plugging in?

My mental model of a charger is that you plug it in and electricity fires out of it like a hose whether you like it or not. When I plug in my macbook charger, it often takes a few seconds before the ...
1
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3answers
135 views

Battery is not charging despite SMC reset

I have a problem with charging of my Battery which has been appeared last night. It was working perfectly well for a long time. All of my friends who had different laptops were so jealous at my ...
1
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2answers
170 views

Kernel_task boosts CPU to 300%-500% (Yosemitte MBP 2011 without a battery)

Long story short, my oldie MBP 2011' battery started bloating, I've contacted a repair service center and they advised me to remove the battery and use it on AC power, while they get a new battery for ...
2
votes
1answer
30 views

6hr 33 min to charge last 6% of battery - is this normal?

Exactly as asked - I couldn't figure out why exactly this is happening?
1
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3answers
63 views

Optimum way of charging apple devices?

I have recently read the article Should you leave your smartphone plugged into the charger overnight? The article listed the following points: You can leave your phone plugged into the charger ...
7
votes
3answers
680 views

Battery turned into X after Yosemite

After I installed Yosemite on my MacBook Air, the battery icon is just an X. I have tried restarting the computer, and turning off the computer, then back on, but nothing is happening! Even the ...
1
vote
1answer
30 views

iPod Touch 1st Gen charging rebooting loop

I have a 1st Generation iPod touch. When I try to charge it, it goes into a loop: The very low battery logo displays The black screen with white apple logo is displayed The screen shuts down ...
2
votes
0answers
31 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 ...
1
vote
1answer
90 views

iPod Touch will charge from computer USb, but not from AC outlet

I have an iPod Touch. If I plug it into the AC outlet, with a AC/USB power adapter, the iPod will charge to about 20%, and then stop charging. However, if I plug it into a computer USB outlet (using ...
1
vote
1answer
75 views

MacBook Air's battery doesn't charge, Service Battery state, but only 400 cycles

Yesterday everything was fine with the battery in my MacBook Air 13'' 2012 (2 years old). It was lasting for 4-5 hours like new. Today, all of a sudden, the battery has stopped charging at all (I have ...
0
votes
1answer
199 views

Is it possible to switch parts between Verizon and AT&T iPhone 5?

I have a water damaged iPhone 5 from Verizon that doesn't work. My cellular plan is also with Verizon. I just purchased an AT&T iPhone 5 from a friend, not knowing that Verizon and AT&T ...
0
votes
0answers
48 views

Apple logo flashing?

Last night my iPhone 4s suddenly crashed and I thought it was because out of battery, even though it was still at 17%. I plugged it in and left it for about 10 mins and it turned back on but it was ...
1
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1answer
32 views

Battery of my Mac with Problems

When I charge my MacBook the battery goes only up to 99% and doesn't reach 100%. Is this something to worry about and if yes, how do I fix it?
2
votes
0answers
32 views

I accidental went swimming with my iPod Touch 5th Generation

Today, I went to a river and forgot that my iPod was in my pocket. I was in there for about half an hour, and only noticed it once I was changing into my other clothes. Is there anything I can do to ...
1
vote
1answer
339 views

Why is my iPhone 5S battery draining overnight and very quickly?

A few days ago I was charging my phone in my car and it stopped charging, and I noticed that the cord had a little hole and smoke was coming out of there. I was buying some food from a local shop, and ...
0
votes
0answers
11 views

iPhone 4 would not turn on [duplicate]

I got an IPhone 4 yesterday and it would only turn on when it's plugged and I bought it new, and it would turn off when I remove from the plug. Please help!
2
votes
1answer
45 views

Once I disconnect from the mains, can I leave the charger cable in the Mac?

I use my MacBook Pro on battery as much as possible, recharging when needed and once a month running it down to recalibrate etc. However, when the battery is charged to 100% I unplug the charger from ...
0
votes
1answer
110 views

Battery Cycles being used very fast

I am using a 13-inch mid 2014 MacBook Pro with Retina Display. It is about 3 weeks old and already has clocked 13 charge cycles. Is this too high ? Also, I follow the practice of fully charging it and ...
2
votes
1answer
171 views

Battery jumps from 25% to 2% to 36%. What's going on?

I have a 2012 13" Macbook Air running 10.9.5. I seem to be losing battery life as of late. This, itself, isn't a huge deal, as I usually use the laptop near an outlet, but as of late the more annoying ...
1
vote
1answer
61 views

Does turning off wifi improve battery life?

I have an iPhone 5 with an unlimited data plan. I usually have it at home where I only have a mediocre cell signal. I don't want to put it in airplane mode just in case I get a call or text so would ...
0
votes
2answers
119 views

Is it better for the battery to leave the iPad plugged when charging is done?

I charge my iPad. Later, I notice that the battery is charged at 100 %. Now, what is better to preserve the battery capacity ? Unplugging the cable. Leaving the cable plugged. The answer may ...
0
votes
0answers
34 views

iPhone 4S battery life

I checked Settings > General > About > Diagnostic & Usage > Diagnostic & Usage Data, I was able to see log starting with 'LowBatteryLog...' So there is a problem with the battery - what is ...
2
votes
4answers
370 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!) ...
2
votes
2answers
401 views

Any risks/disadvantages of using MacBook Pro as a desktop?

I have used iMac or Mac Pro for my Desktop system for the past 5 years but now consider replacing them with MacBook Pro Retina in desktop environment. The reason is mostly because I don't like bigger ...