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

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22 views

new iphone 3gs dead battery

i bought a new sealed iphone 3gs from vodafone store ( yes brand new one, it seems that they got some stored old phones of different brands and models ) the problem is that this iphone wont charge by ...
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8 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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6 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 ...
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8 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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2answers
46 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?
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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 ...
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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 ...
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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 ...
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1answer
84 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 ...
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1answer
166 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 ...
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1answer
54 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 ...
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23 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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1answer
41 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 ...
2
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1answer
180 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 ...
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0answers
41 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 ...
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1answer
27 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 ...
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1answer
263 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 ...
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1answer
40 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?
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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 ...
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1answer
193 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 ...
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0answers
56 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 ...
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1answer
36 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 ...
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2answers
38 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
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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 ...
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174 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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1answer
22 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 ...
2
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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% ?
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21 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 ...
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24 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 ...
2
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1answer
146 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"? ...
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1answer
25 views

Switch GPU based on power source

Is there a way to use a high performance GPU when my MBP is connected to AC power and use automatic switching when it's on battery? I have latest OSX and Mid 2012 MacBook Pro if that matters.
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1answer
46 views

Is it safe to install a third party high capacity battery into my iPhone 5S?

I stumbled upon this battery on Amazon and I was wondering if it'd be safe to install it into my iPhone 5S, assuming it's actually compatible.
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1answer
42 views

Force MacBook to turn on when low battery indicator is showing

i copied some files to a USB drive with 8 minutes left of battery and then closed the lid. 30 seconds later I realised I missed a file and reopened my MacBook to be presented with the low battery ...
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1answer
278 views

MacBook Air Battery is not charging, no light, still be able to power up, battery condition is normal

I experienced this behavior two days ago (My MacBook Air is late 2011 version (4.2): I can still power up my Mac, with or without MacSafe charger connected Battery is not charging There is no light. ...
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0answers
44 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
28 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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31 views

Iphone 4 will not turn on, apple comes for 10 seconds then goes back off

I have no idea whats wrong with it. just started recently happening the other day I reached for it and it was off. Battery was on 49% when I left it, plugged it back in then it showed it was flat? ...
2
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1answer
54 views

MacBook Pro Charging Issues

Last night I plugged in my MacBook Pro, and I noticed the light on the charger was a very faint green, hardly visible in bright light. Today I opened my Mac and noticed it stated 'batteries not ...
2
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0answers
32 views

MacBook discharging while plugged in under load

I have the latest Retina MacBook Pro MacBookPro11,2 I quite often have the CPU at about 400%-500% usage (e.g. 4-5 cores at 100%) and also do GPU intensive tasks. While this is happening, the battery ...
3
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2answers
444 views

When should I plug in my MacBook Pro?

I have a MacBook Pro, and I want to keep its battery healthy for as long as possible. I've heard many "myths" about all these, one of them being that the battery will get "hurt" if I plug in the ...
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1answer
225 views

MacBook Pro Battery Problems

I have a MacBook Pro late-2012 model. And my cable started showing symptoms of fraying. So I ordered an offbrand cable from Amazon with good reviews and it arrived today and I tried it and the Mac ...
0
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1answer
56 views

How to drain an iPhone battery?

My phone froze last night and the battery still has not died. My lock and home button don't work, so I can't just hold the power button down and reset it. I'm on a friend's computer, so my phone isn't ...
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0answers
27 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 ...
0
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2answers
289 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 ...
3
votes
2answers
143 views

How can I reset the service battery warning?

I learned from one of my other questions that the "Service Battery" warning will limit your CPU power and slow your computer down - this is a problem I've been having with my MacBook Pro. I have 906 ...
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2answers
52 views

Does the iPad draw more current when charging?

I seem to be able to charge my iPhone 5 on a variety of USB chargers (car ones included). My iPad retina (iPad 4) seems to be very fussy about which chargers it will actually charge up on. (The ...
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1answer
1k views

Do dynamic wallpapers drain battery?

Is it true that using a dynamic wallpaper will drain the battery faster than a still wallpaper? If so, how much faster does it drain? (I'm using an iPad Air running on iOS 7.1)
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1answer
145 views

Macbook Air mid 2013 not charging

I have a macbook air mid 2013 model. It worked with no problem till now. Today when I opened the macbook it shows no charge symbol(I mean when you press power button it shows a battery icon in a black ...
2
votes
3answers
1k views

Is my iPhone 5S draining battery too fast (and is it due to process mediaServerD?)

My iPhone 5s has always had less good battery life than my previous iPhone (4S), but I'd always assumed that it was due to the increased speed of the CPU/GPU and the increased screen size. It also ...
4
votes
2answers
3k views

My MacBook Air won't charge

My MacBook Air won't charge, the MagSafe doesn't even have that green or red orange light and when it does it isn't very bright. The Battery Icon on the upper right corner indicates not charging. ...