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

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45 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
29 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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0answers
34 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
87 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 ...
3
votes
1answer
41 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
517 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
230 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 ...
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1answer
60 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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28 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 ...
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2answers
471 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
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2answers
177 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
57 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
218 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 ...
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4answers
2k 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 ...
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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. ...
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0answers
46 views

Need to drain (powered down) iPhone4s' battery.

in summary, i think my 4s is having some battery calibration problem. started with batt % dropping rapidly to 1%, but managed to on itself after i charged it for abit. stayed at 1% for the entire ...
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5answers
819 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 ...
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2answers
690 views

Macbook pro doesn't go to sleep after left inactive

In Energy Saver settings (System Preferences -> Hardware section) the Mac is set to sleep after 15 minutes, but nothing happens. Mac drains battery and automatically turns off when battery is low. ...
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1answer
381 views

Checking the health of my iPhone's battery

It seems that my iPhone's (4s - purchased Nov. 2011) battery loses its charge fast. I have read all the relevant OPs. Is there any app which provides information about the battery's health? Or ...
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1answer
36 views

Battery lasts a month on an iPad?

iMac power supply died, and I decided to replace instead of fix. The day after I ordered the replacement, my iPad screen failed to light the screen. That I intend to fix, but I didn’t want to touch ...
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1answer
247 views

Late 2009 MBP 15" battery drain on sleep after putting SSD and ram upgrade

I have a 2009 MacBook Pro (macbook pro 5.4) with Core 2 duo 2.53ghz 4GB RAM with 256 HDD. I upgraded the RAM and switched to SSD. Here are the specs: Crucial M4 CT256M4SSD2 2.5" 256GB SATA III MLC ...
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2answers
305 views

Can an iPhone be force started before the 15 minute recharge period?

There are times when the iPhone is at low battery level that it turns itself off. Sometimes, it maybe when I am going to charge it but looking for where my cable is, it turned itself off. So I ...
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1answer
117 views

Chrome continues running even when Mac should be is asleep

I have the latest version of Chrome running on my Mac. I've noticed that even when I close the old intending to put my computer to sleep, Chrome continues running. I know this is the case because I ...
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0answers
74 views

External Firewire Audio Interface Overheating Macbook Pro 6,1

When I connect an external firewire audio interface to 17" Macbook pro 6,1 2.53ghz i5 the computer heats up at an alarming rate. I've heard all sorts of things on the internet, but still no reasonable ...
2
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1answer
156 views

Skype video call taking a lot of battery power on mavericks

I have got mavericks 10.9.2 and latest Skype version 6.14(351) on a MBA 2013. Whilst on a video call with one person only both cameras turned one and very good wifi signal Skype drained about 18% of ...
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1answer
56 views

Is there a solution for preventing battery drain on the 5s after the iOS 7.0.6 update?

I have tried a hard reset, removing Outlook email account, and closing all apps and turning off Background App Refresh.
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0answers
68 views

Erratic battery percentage behavior

I purchased an iPod Touch in December 2011. It came with a Target 2 year warranty. From the time I started using it the battery never read correctly. I decided before the warranty was up in February ...
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0answers
131 views

iPod Nano doesn't get fully charged when connected to MBA

I've a 7th generation iPod Nano. And it's working fine. I usually used to charge it either by connecting it to a wall charger or through my iMac. And every time it got charged just fine. The battery ...
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1answer
90 views

Connected new charger with Macbook Pro. Both Macbook Pro and Charger stopped working. Any reasons?

My macbook pro charger stopped working sometime ago. In the meanwhile I have been using friend's charger without any problem. Today I bought a second hand charger and when I tried to connect it with ...
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0answers
88 views

Charging issue MacBook Pro (late 2009)

I came home one day and the battery on my MacBook was dead. I plugged it in and the light stayed green. After doing some research I reset the SMC and that didn't work. It caused the light to blink ...
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0answers
13 views

iPhone 4 CDMA does not charge when it came 92% battery [duplicate]

I had the iPhone 4 CDMA, it had a problem is it didn't charge when the battery came 92%. I have no idea about that, does anyone could tell me what exactly it is?
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2answers
837 views

iPad 2 charging very slow

My iPad 2 has recently become VERY slow to charge- about 1% every 10 minutes while plugged into my Retina MacBook Pro (my usual charging source). I've tried both USB ports on the rMBP and neither ...
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1answer
89 views

Unresponsive Trackpad Click After Battery Depletion

I had a very odd situation happen with my machine at the weekend and wondered if anyone could shed some light on it. I have an early 2013 Retina MacBook Pro and I was watching a DVD on it using the ...
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0answers
424 views

Macbook Pro Early 2011 with Mavericks suddenly got battery died

I've got a MacBook Pro 15" (Early 2011, i7 2.2/750GB/HD6750M) and I did some upgrades later on including 2x4GB RAM, a 256GB SSD and a 750GB HDD to replace the optical drive. This machine was smoothly ...
3
votes
1answer
46 views

How many hours since I unplugged my Mac?

Mobile phones usually say this as "xyz hours on battery" by counting the time from when they are unplugged from power. Can I find out how many hours has it been since I unplugged my Mac from charging ...
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1answer
156 views

New MBP 13 retina late 2013 battery problem

I just have bought new MBP 13 retina late 2013 and after installing: adobe photoshop, office for mac 2011, xcode, eclipse, java, and MAMP is battery life too short. 100% charched battery is remaining ...
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votes
2answers
448 views

brown sticky residue in my macbook pro charge port

i have just noticed a brown type of sticky residue in my charge port on my macbook, it wipes off but not completely and to me it smells like battery. can anybody tell me if i have a problem here or if ...
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2answers
350 views

MacBook performance while on battery vs plugged in

Should I expect my MacBook Air to run slower while on battery vs while plugged in? In other words, will it slow down the CPU/graphics/etc while on battery to conserve power?
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2answers
165 views

MacBook Pro battery life tanking even after battery replacement?

I've been having some issues with battery life on my MacBook Pro (15", Mid 2010). I thought I had tracked it down when I found out that the battery was near the end of its life (only holding 60% of ...
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1answer
125 views

Battery issue with iOS7 and iPhone4

So, I have IOS7 installed in my iphone 4. I first noticed this bug as follows: When I get home around 18h I plug-in the computer, and at around 23h before going to bed it's already 100% for some ...
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1answer
9k 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 ...
0
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1answer
3k views

My iPad Mini won't turn on after charging

Last night I went to use my iPad and found the battery was completely drained. So, I charged it, after a few minutes it turned back on, and I looked at the battery symbol and it had said that it was ...
0
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1answer
151 views

Is it bad to use MacBook pro with battery every day.

Is it bad to use new MacBook Pro with battery every day? Or would it be better for the battery lifetime to use battery only one day a week? The problem is that I don't think I can change battery if ...
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0answers
67 views

Does APNS work over LTE, or only UMTS/GSM and WiFi?

Over at Android Enthusiasts, we are having a discussion of what's more battery-life efficient — having APNS over GSM or UMTS networks during sleep, as TS4264 appears to indicate (thus ...
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3answers
10k views

Why does my battery drop with 1% within a minute after removing the charger?

I just got a new iPhone 5S a week ago. Works perfectly aside from the fact that the battery tends to act weirdly. As mentioned in the title, when I remove the charger the battery percentage drop by a ...
0
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1answer
677 views

Correct battery voltage for new MacBook Pro battery

I have a 17" Macbook Pro (5,2 mid 2009, MC226LL/A) that has a battery that is in need of being replaced. I'm looking for the correct battery for it and have found various batteries that say they are ...
0
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2answers
48 views

What counts as a partial charge for my rMBP?

I just recently decided to switch over to the Mac for the first time by buying the latest Retina MBP (which shipped with Mavericks). I use it like a commuter where I have it unplugged for a couple of ...
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2answers
135 views

How can I force a Mac laptop to shutdown when the battery is below 25%?

It is common wisdom that Lithium-Ion batteries should not be left with 0% charge. However, some users might not be aware of this common wisdom, or simply refuse to concern themselves about proper ...
3
votes
1answer
112 views

Apps using significant energy terminal/applescript

Does anyone know how to access the "Energy Impact" data used to determine "Apps Using Significant Energy" displayed in the battery menu bar? I'd like to use it in a shell-script/applescript.