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

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20 views

My MacBook Air won't charge correctly : the light is green instead of orange

I have a 2009 MacBook Air (MacBookAir2,1) I have a compatible MagSafe and a Apple one. Sometimes (almost most of the time), when the computer is running and not in sleep, if I plug the MagSafe, it ...
1
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0answers
16 views

MacBook Pro won't turn on!

I was using my Macbook Pro when it turned off. The things I had plugged in at the time were a USB cable to a sound blaster thing and then into some speakers. I also had a second monitor attached, ...
3
votes
0answers
1k views

Why Safari is consuming so much battery?

From last 2-3 weeks I started noticing that my iPhone is consuming more battery than usual, around two to three times more. When I looked at battery consumption details I found out that Safari is ...
0
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0answers
21 views

iPhone 4S on iOS 9.3.2 turned off, won't start and doesn't respond when plugged in

My iPhone was almost fully charged, 90% when all of a sudden it turned off on it's own, and it won't start. I tried a hard reset, plugging it into a power outlet and into a laptop with iTunes, I've ...
0
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3answers
21 views

MacBook Pro turned off and won't turn on!

I was just using my laptop normally when suddenly the whole computer just shut down. I turned it back on straight away and it was fine. Another hour passed and it did the same thing. I could also turn ...
1
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1answer
14 views

MacBook Pro stop charging at 99%

Most of the time my MacBook Pro stop charging at 99%. But when I check the battery status it says battery is charged. My battery cycles is around 500. Does it means I needs a new battery or it is ...
1
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1answer
58 views

MacBook Pro 2015 lost battery capacity

I have used my new MacBook Pro Retina for a few days. After three battery cycles, the battery lost capacity from 6960 mAh originally to 6616 mAh now. Is it normal to lose almost 350 mAh of capacity ...
5
votes
2answers
2k 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 ...
4
votes
3answers
4k views

iPhone 4S/IOS6 - battery drain after the camera usage

I just discovered that my iPhone4S/IOS6 battery drains too fast after I use the camera. So: After the fresh restart the phone lasts 3 days - when not taking photos or videos. Even if I take one ...
1
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1answer
36 views

Macbook Pro weight increased after battery replacement

After my battery died I have replaced it in Authorized Service Provider. This costs nearly 140$. However after replacement I noticed that the weight of my Macbook Pro Retina (Mid 2014) has been ...
12
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8answers
40k views

How to figure out iOS device battery health?

I'm looking for ways, similar to coconutBattery for OS X to figure out current health of battery for iOS devices.
5
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2answers
535 views

How to check the battery level of devices connected via Bluetooth in OS X

I have a set of Bluetooth headphones that I use with my iPhone and Macbook (OS X Yosemite). On my iPhone, a little battery meter pops up next to the Bluetooth logo each time I'm connect the ...
3
votes
4answers
12k 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 ...
0
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1answer
25 views

Will my 14.5V USB-C charger destroy my 9.7 inch iPad Pro?

The charger is the one for the MacBook (29W) and the iPad is the 9.7 inch Pro. Can they be used together without damaging the iPad battery?
2
votes
3answers
7k views

Macbook Pro Mid-2010 15" is not charging with dim green light

I have spilled a bit of water on the keyboard of my Macbook Pro this Monday. It continued working just fine. So, I took it home, and 2h later, when I pluged the charger in, the light turned into a ...
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0answers
11 views

Late 2014 Macbook battery will not hold charge; US model used in Germany with converter

My sister has a Macbook Pro (13", Late 2014 model), purchased around Christmas 2014 (~18 months ago), which has stopped holding a charge. She can run the macbook fine off of the cord, but it ...
1
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1answer
36 views

How to schedule airplane mode?

I want to schedule Airplane Mode during the night (10PM–6AM) on my iPhone. How can I do that? I used to turn off my previous phone (a non-smartphone). I do that especially to save some battery life.
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0answers
22 views

Iphone 5c acknowledges that its plugged in but wont charge after replacing charging dock

I hope that it is just a cable that is not plugged in properly and i wont have to take it apart again, but i removed the old charging dock that includes the microphone, headphone jack and the usb ...
0
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0answers
21 views

MacBook Air 2009 using too much battery during sleep - Too old?

I have just bought a MacBook Air Mid 2009 and i'm surprised about the speed it uses battery during sleep. Here are the technical features : MacBook Air 13" Mid 2009 (MacBookAir2,1) Mountain Lion ...
3
votes
1answer
37k views

iPhone 5s: Which consumes more battery, 4G, or 4G LTE?

Under Settings > Cellular, there's an option to enable/disable LTE. When disabled, my phone reverts to 4G, as indicated by the icon in the status bar. I've read elsewhere that using 3G causes greater ...
7
votes
3answers
16k views

How can I preserve the battery cycles on my MacBook Air?

I recently got my MacBook Air, and the battery cycles is already at 12. Is this good/average? I don't know if I am not charging it properly or something, because I don't want to ruin my battery in the ...
0
votes
0answers
12 views

How to benchmark iPod mini battery running time / Good iPod mini replacement batteries?

I've got a used 2nd gen iPod mini that I'm planning on retrofitting by upgrading it to flash storage. I got it at a good price and since the thing's 10 years old, its battery probably isn't as good as ...
2
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4answers
2k views

Application to Monitor Battery Usage by Application

I want to know what's draining my iPhone battery. Is there an application that can monitor / estimate battery usage by application?
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0answers
48 views

OSX10.11: Completely Disable Spotlight

Spotlight is driving me crazy. It has a constant CPU usage of 100-200% making my laptop run hot and reducing my battery life to half of what it used to be. This is my development machine and I can ...
6
votes
1answer
2k 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 ...
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0answers
33 views

Installed new SSD now when my mac dies to freezes on restart

I've installed a new SSD not an OEM, but it's a compatible fit to my early macbook pro 2015 with retina 13". When my battery dies it doesnt hibernate my mac, so when I restart it, it freezes and then ...
9
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1answer
1k views

How does Coconut Battery determine a Macbook battery's design capacity?

A macbook's battery has three charge numbers: The current charge The maximum charge The design capacity Even if a Macbook remains plugged in, OS X does not attempt to charge—as long as (1) is 95% ...
3
votes
2answers
11k views

Does the grayscale feature of iOS 8 extend the battery life?

In the way to reduce the power usage of my iPhone 5 (iOS 8), I'm simulating the power saving mode of Samsung Galaxy Note 4 by turning on the "Greyscale mode" but does it really reduce the power usage ...
1
vote
1answer
25 views

How do I assess how “normal” my battery is?

OS X assesses my battery as "normal" under System Information > Power. I understand that at some point this is going to change to some kind of "we recommend you replace the battery" message. I am ...
0
votes
1answer
34 views

MacBook Pro 13" (late 2011) gets extremely hot during normal usage

I'm using a 13" (late 2011) MacBook Pro and it has been getting so hot that I cannot use it on my lap, even when barely any applications are running. I have checked Activity Monitor and there are no ...
0
votes
1answer
26 views

iPhone won't boot after installing higher capacity battery

I wanted to upgrade my iPhone 5 to a higher capacity 2680mAh battery, but when I installed it the Apple flashes on and off and the phone will not turn on. I had to reinstall the old battery. Any ...
27
votes
8answers
38k views

How do I debug an out-of-control “kernel_task” process?

Just recently I noticed my battery life having a pretty significant drop and the "kernel_task" process using quite a bit of CPU (a constant 1-6% on my 2.8ghz dual-core i7, 2010 MBP). Obviously I think ...
4
votes
1answer
2k views

Macbook Pro Retina – “Battery Is Not Charging”

My Retina MacBook Pro is currently on 4% battery power, but when I plug it in, the battery icon up the top shows the plug icon instead of the lightning bolt icon inside it to say it's charging and ...
0
votes
2answers
43 views

Will grayscale consume or reduce battery usage?

So I was wondering, if I turn on grayscale, will it consume or reduce battery usage? I want to know because if my phone battery is low I want to keep it running as long as possible.
0
votes
1answer
65 views

Why does my iPhone power off when the battery is down to 30%?

Today I was walking using my iPhone 6S running iOS 9.3 as a pedometer and it shutdown. When I got home and plugged it in, it said 30% capacity. That seems strange. I would expect it for 2% or 5% ...
0
votes
1answer
69 views

Macbook will say it's charging, but it's not

I have a Macbook Pro 13" i7 Early 2011 (MacbookPro8,1). It's on its second battery (DP bq20z451 manufactured Dec 2012) from March 2015. It was working fine for a while, but in the last month it's ...
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2answers
62 views

Any way to turn on the reduced power mode a macbook uses under battery power, but while plugged into a power adapter?

I have an external battery rigged up for my MBP. It goes through the magsafe adapter. The battery is about twice the capacity of the internal battery. The problem is, the macbook thinks it is ...
0
votes
0answers
39 views

How do I identify a good quality replacement battery for an iPhone?

My iPhone 4s battery was dying, so I replaced it (the battery). But the replacement battery (which was a cheap one from eBay) is pretty poor. The replacement battery looked exactly like the original ...
6
votes
3answers
9k views

Taking battery out of my MacBook Pro

Yesterday I bought my first Mac, the new Macbook Pro 13". Apple recommends not having the battery charged connected to the MacBook if the battery is 100%. In other laptops I had, I could just remove ...
3
votes
2answers
282 views

Extreme energy usage by Spotlight

I recently (two days ago) updated to El Capitan on my work machine (15" MBP, Mid 2015, 2.5 GHz Core i7, 16GB ram, R9 M370X, 500GB SSD) and ever since then, Spotlight has been draining my battery and ...
0
votes
1answer
52 views

Why does iPad run out of batteries while it's plugged in?

I'm playing Vain Glory with my iPad Pro plugged into the 12W adapter via the supplied Lightning cable. Screen goes black, battery dead. Takes a few minutes to come back on. Why on earth did the ...
3
votes
1answer
362 views

Battery Life While Using External Monitor on rMBP is Less

I have a Retina Macbook Pro 2014, in clamshell mode attached to a full HD monitor. I see that battery lasts much less when connected to an external monitor. Is there any explanation to why this ...
2
votes
2answers
90 views

Mid 2012 MBP shuts down claiming no power with charge at 30% or 40% or more

I have two mid 2012 MBPs. Sometime last year they both started randomly shutting down and showing the 'please plug me in to power' image when trying to start them up. That would be fine if the batter ...
0
votes
0answers
11 views

MacBook Pro charging tip [duplicate]

I'm about to buy a Mac Book Pro Retina, I'm going to use it mostly at home and when needed I'll take it to my workplace, and so forth. I know it does not have a removable battery, so I'm wondering ...
0
votes
3answers
117 views

Does charging my early 2015 MacBook Pro all the time damage the battery? [duplicate]

I am using my early 2015 MacBook Pro as a desktop by connecting it to an external display, thus, it needs to be plugged in to a charger all the time. Does charging my early 2015 MacBook Pro all the ...
2
votes
2answers
250 views

Running Ubuntu on MacBook Pro 2015 — run natively (dual boot) or run in virtual machine for longer battery life?

I currently use Ubuntu in a virtual machine, using VirtualBox software on my host operating system, OS X, on my MacBook Pro 2015. However, the battery life drains quickly when Ubuntu is used ...
0
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0answers
52 views

My iPhone Won't Charge!

I have an iPhone 6 and I've been using it for around 6 months now. It has never ever fell on the ground or in water so I don't understand. My problem is, my iPhone just won't charge. Here are the ...
0
votes
1answer
29 views

Can I use the battery from an early 2014 MacBook Air in a mid 2012 Air?

I just bought a used mid-2012 MacBook Air to replace the early-2014 model my dog killed but the battery life is terrible comparatively. Can I take the battery out of the 2014 and use it in the 2012 ...
1
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2answers
153 views

Low Battery Alert for Mac OS X El Capitan

I have Macbook Air, Mac OS X El Capitan. There is no warning box shown before the battery is near %15, like it did for Mountain Lion. So I can not notice and my computer goes sleep simply when the ...
0
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0answers
35 views

Two iPhone users update their devices to the newest iOS version and have their phones fried

Hello Apple Stack Exchange Community! I run a local computer and phone repair shop, and I've run into something I haven't seen before. Two of my past clients, both who take meticulous care of their ...