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

learn more… | top users | synonyms (1)

0
votes
0answers
4 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 ...
3
votes
2answers
346 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 ...
0
votes
2answers
39 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?
4
votes
3answers
1k views

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

Just discovered than my iPhone4S/IOS6 draining battery too fast after I using the camera. So: after the fresh restart the phone lasts 3 days - when not taking photos or videos, but enough take one ...
5
votes
2answers
3k views

What's the difference between the battery of iPhone 5s vs iPhone 5?

Do they have the same capacity and/or run time for certain identical tasks? I know iPhone 5's battery has a charge capacity of 1440mAh. Has this been improved in the new iPhone 5s and/or iPhone 5c?
3
votes
1answer
464 views

How to know the duration of battery usage in one session?

I would like to know how long was my battery running since it's last charge. There is a built-in time-remaining counter but I would like a time-used counter.
2
votes
2answers
826 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 ...
2
votes
2answers
4k 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
votes
2answers
244 views

Is there an iOS app that measures/reports the battery charging current?

I suspect my fake lightening cable charge my iPhone 5 much slower than my original lightening cable on the same charger. Is there an app that will display the current battery draw/charging current and ...
8
votes
5answers
2k views

How to disable battery charging?

From the pmset man page: POWER SOURCE ARGUMENTS -g with a 'batt' or 'ps' argument will show the state of all attached power sources. […] Certain Apple battery calibration tools may ...
0
votes
4answers
904 views

iPhone 3GS turning off randomly while being used

While using the phone it randomly shuts down. And when I turn it back on battery drains by about 3 or 4 percent. Could this be a battery problem or a sign to another major problem? So the only way I ...
3
votes
1answer
4k views

Does Battery Usage/Percentage need to be calibrated again?

I recently installed iOS 7 on an iPhone 4S. Does the Battery Usage/Percentage (as shown in the top-right corner of the screen of the phone) need to be calibrated again (by letting the battery fully ...
0
votes
0answers
30 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 ...
4
votes
5answers
515 views

No Batteries Available ?-How to Check battery health on MacBook Pro early 2011

A few days ago, I went on vacation and unplugged power cable from my MacBook Pro 13' early 2011 and then I got back home, the battery was not detected by OS and didn't charge. I then understood that I ...
2
votes
1answer
172 views

New MacBook Pro Retina, bad battery?

I just purchased a brand-new MacBook Pro, Retina (15" screen). The "Hello" pamphlet in the box starts out: Your battery is charged and ready to go, so you can start using your Mac right out of the ...
0
votes
1answer
20 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 ...
0
votes
1answer
22 views

Is there an external battery available that is compatible with iPhone 4s and 5s?

The company I work for is developing an app that uses geolocation and drains battery very quickly which is obviously a problem. The customers will have both iPhone 4 and 5s so it would be great if ...
4
votes
1answer
3k views

Is it advisable to calibrate the battery on a MacBook?

How useful or necessary is it to calibrate the battery on a MacBook? If it is, should it be carried out when first purchased and does calibration of the battery mean it will also last longer?
1
vote
1answer
138 views

iPhone 5S gets very hot and drains battery

My iPhone 5S is getting very hot and the battery drains like 5 % in 30 seconds. I've tried it all, restoring and stuff and I've read that the problem is with iCloud. So I've deleted my iCloud account ...
3
votes
1answer
796 views

Dilemma about replacing the battery in my 17" MacBook Pro mid-2010

After 3 years my mid-2010 17" MBP model is telling me it's time to replace the battery. The current one (model A1309, FWIW) has had ~1000 cycles now and can't hold the charge reliably anymore. Being ...
0
votes
1answer
65 views

Macbook Pro 13 Retina battery drain using Chrome browser

I'm planning on purchasing a Macbook Pro Retina 8GB/256GB to replace a 2009 Macbook Pro. I'm a long time Mac user but my hesitation is whether the Chrome browser battery drain issue in Mavericks has ...
2
votes
1answer
40 views

Possible to charge iPhone through other means?

I am too cheap to purchase a USB charging connector for my iPhone, so I was wondering if there's a way to create a USB cable at home or use some other USB cable and get the job done safely. For ...
1
vote
0answers
161 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 ...
4
votes
6answers
3k views

Is it safe to turn the iPhone 4 off for over a week

I am going away on holiday for a week but don't want to take my phone with me because I'm afraid of running up a huge bill, is it safe to turn the phone off for this long? Or can it damage the ...
0
votes
1answer
49 views

Can I remove battery while my iPhone 4s is still on?

I've had this annoying problem with my phone that has happened a few times now. Basically it just totally freezes. My top button is broken, so I can't turn the phone off using that. My assisted touch ...
1
vote
0answers
22 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 ...
3
votes
1answer
869 views

How to have my MacBook Pro safely hibernate when out of juice?

My all new MacBook Pro was on the battery, and warned me that the battery was almost finished. I left the Mac take care of himself. Later, I plugged the Mac and I pressed the button Power. Hearing the ...
0
votes
0answers
38 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 ...
3
votes
1answer
17k views

What causes iPhone low battery crashes? Is there a software fix?

Some iPhone users (especially those with devices that've been in use for a while) encounter a problem where the device crashes once the battery gets low. For example: "After updating to iOS 7 ...
0
votes
1answer
24 views

Effects of Current Fluctuations on Charging

iPhones, iPad, etc, all have their optimal specifications for charging. A power source that does not meet those specification results in a slow charge. However, what happens when the specifications ...
1
vote
1answer
235 views

Windows on a Macbook Pro with integrated Intel Iris Pro only

I've been wondering about this since the last refresh of the Macbook Pro range...I have a need to run some Windows-only software, and I've read in the past that many people complained about lower ...
0
votes
1answer
39 views

Should you unplug the cable once you MBP is fully charged? [duplicate]

With Mavericks is this still needed? Doesn't this eventually cause the battery to die faster because it means it'll have to go through more cycles frequently?
0
votes
1answer
19 views

my iphone5 is shutting down and has no power to turn on what do i do?

I've had my iPhone 5 for a year now but ever since iv had it it always had battery problems, i tried to replace it with a new battery but it would work for a day and the power off. Now when i try to ...
0
votes
2answers
141 views

How to charge the MacBook Pro from 12 Volts?

Aim: I would like to charge my MacBook Pro (MBP) form a 12V lead-acid battery. However there are no official chargers from Apple for that purpose. There exist quite some alternative products on the ...
1
vote
1answer
190 views

Can an underpowered charger actually help my Macbook battery's longevity?

I have just upgraded from a Macbook Air (Late 2012) to a Macbook Retina (Late 2013). Now I have a 45W and a 60W charger, both MagSafe 2. Using iStat Menus and Battery Health for monitoring voltages ...
2
votes
2answers
1k views

iPad boot loop only when powered - brief flash loop when connected to USB - jailbreak gone awry?

Received an iPad from a customer in an unknown state. Report was "does not power on". Device is out of warranty. It's the 1st generation iPad with a 3G chip. Symptoms: when connected to power only, ...
0
votes
0answers
52 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 ...
1
vote
1answer
35 views

How to find out MBA-2011 13" battery serial number on the battery?

I'm aware of ability to find out the battery serial number via About This Mac. Is it also written somewhere on a physical battery, to be read without turning Mac on? If so, where? Of course I'm ...
0
votes
2answers
36 views

spinning circle next to wifi symbol when music folder open

I get the spinning circle when my music app is open, it never turns off! Can this drain my battery? on brand new iPhone 5s on ios7
0
votes
3answers
227 views

Replacement battery for Macbook Air 2011: equal to or better than original

I need to replace a battery for my Macbook Air 13" mid-2011. There is no Apple's own repair service where I live, and I'm fairly savvy with electronics to do my own repairs. How can I identify ...
0
votes
1answer
45 views

Mac Book Pro Overheating

I have a 5yr old Mac Book Pro. I didn't have it plugged and had shut it down. When I went to open it I found the whole laptop was heated and couldn't get it to turn on. I left it a while then plugged ...
1
vote
1answer
19 views

Is there a software that tells for how long the computer has been running on battery?

There are many apps in store that will tell you how much your battery will last before the computer turns off. I need something that tells me something like : "You unplugged at 95% and have been ...
1
vote
0answers
43 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 ...
2
votes
1answer
41 views

Is it possible to use Macbook with 0% health?

Is it possible to use macbook pro if the battery is at 0% health? It is 1% at the moment and work fine when plugged, but what about if it goes to 0% ?
0
votes
0answers
20 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 ...
9
votes
6answers
51k views

Battery diagnostic tool at Apple Genius Bars

I have a one-year old iPhone 5 and it's battery performance has dramatically decreased over the last few months. As I could use my iPhone for over 24 hours a year ago, the lifespan has halved by now. ...
1
vote
1answer
11k views

iPhone 4S - sudden drop in battery percentage

I've bought a half-year-old iPhone 4S a couple of weeks ago and I just ran into a really weird issue the third time now: the battery percentage would suddenly drop 30-40-50%. One minute, it's, say, ...
0
votes
0answers
21 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 ...
39
votes
6answers
42k views

Should I disconnect my MacBook Pro's power cord when the battery is fully charged?

Title says all. My friend told me that I need to disconnect the power cord when the battery is fully charged. Otherwise, I will shorten the life of the battery. Is that true? I am going to use my ...
2
votes
1answer
122 views

when it say “Built-in battery”, then does it mean that “battery is not user-replacable”?

Read this line in iPhone 2G specification http://en.wikipedia.org/wiki/IPhone_2G Built-in rechargeable Li-ion battery 3.7 V 1400 mAh So, "Built-in battery" means "battery is not user-replacable"? ...