Questions tagged [battery]

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

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votes
6answers
44k 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. ...
6
votes
1answer
3k 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 ...
6
votes
2answers
760 views

Is there a way to only enable automatic graphics switching when on battery power?

It is rare when I use my MBP on battery power. But is there a way to only enable automatic graphics switching when on battery power?
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7answers
14k views

Macbook Pro mid-2015 15" swollen battery

I bought the MBP around 2016 April. Few months ago, around 2018 Nov, bottom of the device appears a bit uneven, with slight gap with my desk. Over past few months, it wobbles more and more serious. ...
5
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4answers
2k views

Why would a new MacBook Pro charger fail in one month?

I've got a new MacBook Pro 15" that comes with the 87W USB-C adapter from US. I live in Turkey and I've got all my MacBooks from US with US chargers, and had no issue with them (as they are meant to ...
5
votes
5answers
43k views

Is it wise to turn off the iPad completely if I don't use it during the day?

A friend of mine has an iPad that she uses only once a day for about a half hour. I told her to turn it off completely in between uses to conserve energy - no point having the device run in standby ...
5
votes
3answers
15k views

Charge from USB on computer or wall socket?

Is it OK if I keep charging my iPad and iPhone using the Mac USB ports? Or is it better to charge them with the supplied chargers? I understand that charging slowly is better (though I'm not sure why)...
5
votes
1answer
189 views

Is it good to keep apps closed on iOS devices?

Is it better to keep apps closed (double tap home button, hold the icon, and exit the app), as much as possible on iOS devices? I know the more apps one has open, the more RAM, for example is used, ...
5
votes
1answer
12k views

What could cause MacBook battery cells to swell up?

I have a problem with my 3 year old MacBook. The battery has "swollen up" (I could post a picture if that is of help). One side of the battery is much bigger than the other. Since it no longer works, ...
5
votes
3answers
8k views

Can a low-wattage adapter fully recharge the battery of a turned off MacBook?

MacBooks come with power adapters that provide a certain wattage (for example 87 W) required to keep the computer running and charge the battery. If used with a lower-wattage power adapter (for ...
5
votes
2answers
31k 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 ...
5
votes
1answer
47k views

Why is iPhone battery percentage fluctuating at lower levels?

My iPhone 4 (going on 19 months of love) has recently started having a bit of an issue knowing the percentage of its battery it has remaining. I will be using it and it will jump from 31% to 19% and ...
5
votes
2answers
264 views

Does charging to 100% damage an iPhone battery

I have an XR and as I am indoors a lot of the time, my phone does spend a few hours charging at 100% (although I unplug at night). It's rare that I let the phone run past 80% and even rare that it ...
5
votes
3answers
666 views

Maximize iPhone battery lifespan by keeping it plugged into power whenever possible

I know, sometimes it can explode, but is it a good advice to let the iPhone - whenever possible - plugged in to a power outlet in order to maximize battery lifespan (so it's almost always at 100%)? ...
5
votes
1answer
207 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 ...
5
votes
1answer
1k views

What is the font the battery percentage uses?

A bit of a stupid question, but what is the font the battery percentage (pictured below) in OS X uses? It is not the standard font you can get by calling [NSFont menuBarFontOfSize:0], I have noticed.
5
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1answer
2k views

Get notified when battery is charged

Is there a way to write a custom apple script or any other way to get a Alert or Desktop notification when the battery on my Macbook Pro reaches a certain percentage of charge?
5
votes
3answers
7k views

MacBook Pro with shot battery, possible to prevent CPU throttling?

I have a late-2013 MacBook Pro 15" which still has the original battery. It's at 1,144 charging cycles, and a few days ago the battery health was at about 50%, though since then it plunged to 4%. The ...
5
votes
1answer
15k views

Macbook pro 13 inch 2017 W/ touch bar - battery drain during sleep

OS Version I'm on is High Sierra 10.13.2 My battery seems to drain way too much on my new MacBook Pro 13 w/ Touch bar 2017 when it's supposed to be sleeping. Things I've done after reading other ...
5
votes
1answer
6k 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 ...
5
votes
5answers
14k 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 ...
5
votes
2answers
6k views

Battery indicator is not moving further from 96%

I bought a new macbook pro, till the day I bought the battery indicator is not moving further from 96%. I wonder if there is a problem with the battery because if I unplug my power cable it is still ...
5
votes
2answers
2k views

With Power Nap off, what causes MacBook Pro 2018 battery drain with lid closed and wake-ups every 2 hours?

My MacBook Pro 15" 2018, running macOS Mojave 10.14.5, is losing about 10% battery overnight, despite the lid being closed. I have disabled power nap. Here is the output of pmset -g log, from the ...
5
votes
3answers
8k views

iPhone 6 charging best practices

Should I charge every night? (Assuming that I consume more than 50% during the day, but sometimes not much more.) Should I turn off the device during the charge? (Assuming that I don’t need the device ...
5
votes
2answers
30k 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?
5
votes
1answer
351 views

Have battery status only show in menu bar when running on battery power

I use my MacBook Pro plugged in to power and an external monitor 90% of the time, and thus the little charged battery indicator in the menubar is useless. However when I'm not on wall power, is there ...
5
votes
3answers
354 views

Should I expect battery life on an iPhone 4S to be significantly worse than on a 3GS?

I just upgraded from a 3GS to a 4s and my battery life is dramatically worse. I wasn't expecting it to be the same (though I was hoping that it might even be better), but I'm seeing a big difference. ...
5
votes
1answer
209 views

Change what percentage/time remaining causes the battery icon on Mac to go red

I'm dead broke. So, I have a cheap battery for my dead-broke-esque 2008 MacBook. It only lasts about 2 hours on a full charge. However, it's a little goofy at times. Not in a dangerous way, just that ...
5
votes
1answer
15k views

Why my Battery status color in the menubar is Red while it is charged more than 20%?

I left my MacBook Pro 13-inch, Early 2011 running OS X 10.11.6 for half an hour while was charged more than 50%, and when I came back, I saw the Battery status color in the menubar is red while it was ...
5
votes
3answers
13k views

iPhone battery life is awful even after replacing it

I have an iPhone 3gs 32gb. As they do, my battery was noticeably depleting as well as conflicted with the device having been slightly water damaged (dropped in quickly but immediately turned off and ...
5
votes
2answers
19k views

How do I stop automatic Bluetooth streaming?

When my iPhone connects to Sync in my Ford truck it automatically starts playing music on my iPhone. This kills the battery. Autoplay on the Sync system is off.
5
votes
1answer
562 views

Does replacing an iPhone/iPad battery reset the battery stats?

I have purchased a refurbished iPad. It is from a Apple-certified repair shop, but I understand this is not the same as Apple refurbished. On a MacBook with an internal battery, I can see in System ...
5
votes
2answers
3k views

How to prevent screen lock when MacBook AC adapter is unplugged?

I use my MacBook connected to an external monitor via HDMI with the lid closed, and plugged in to AC power (in closed clamshell mode). If I disconnect the power cord (usually happens accidentally), ...
5
votes
2answers
7k 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 ...
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 ...
5
votes
5answers
19k 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, ...
5
votes
2answers
2k views

Macbook Pro Battery / Discrete Graphics Card Issues in 10.8.2

I am posting because I currently have a 15'' Macbook Pro (Early 2011 edition) and have suffered from poor battery life since upgrading from Mac OS X 10.7 to 10.8. Before the upgrade, I could use my ...
5
votes
3answers
8k views

Does plugging in an iPhone/iPad make a difference to its battery lifespan?

I've been led to believe there's a difference between how a MacBook and an iPhone/iPad consume power: when a MacBook with a fully charged battery is plugged in, its components draw power directly from ...
5
votes
0answers
1k views

Disable battery warning for bluetooth keyboard and mouse

I would like to disable the extremely annoying notification popups when my bluetooth mouse or keyboards batteries are getting low. I have enough rechargeable batteries in my drawer, so I do not need a ...
5
votes
2answers
447 views

iPhone suddenly drains battery quickly, but only sometimes

My iPhone 7 normally lasts about a week, but sometimes it suddenly starts draining very quickly. I have Background App Refresh completely turned off, and I wasn't using the phone at all when the ...
4
votes
6answers
21k 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 battery?...
4
votes
2answers
15k views

First steps after acquiring a new MacBook Pro (w.r.t ensuring optimal battery life)?

I just unboxed a new MBP 13.3 inch i5. I wanted to know what is the best way to start using it, so as to ensure optimal battery life i.e. Should I charge it to full capacity, before even booting it ?...
4
votes
5answers
3k 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 ...
4
votes
2answers
426 views

Strange loading screen when MBP battery dies and reboots

I have a 2007 Macbook Pro and for nearly two years, the battery has been toast. In April, Apple replaced the logic board. Since the repair, whenever the power cable comes loose, the MBP shuts off as ...
4
votes
2answers
59k views

What does the amber light on the AirPods case mean when AirPods are not in the case?

When I take the AirPods out of their case sometimes the case light changes color from orange to green or vice versa. I know the amber light means it is either charging or needs a charge. Is it ...
4
votes
2answers
2k views

iPhone/iPad battery charging/discharging cycle

Apple recommends at least one charge cycle (charge to 100% and then running it down completely) per month. Then, is it OK to charge iPad/iPhone all the time as long as I have charge cycle per month? ...
4
votes
1answer
376 views

Are there any deep details on the specifics of what the “Low Power Mode” in iOS 9 actually affects?

So as mentioned in this canonical question and answer thread on iOS 9 features, “Low Power Mode” is a good thing. This is what iOS 9’s blurb on “Low Power Mode” explains it does when activated: Low ...
4
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4answers
4k views

Aura Pro X SSD Macbook Pro Retina 2015 issues

A few weeks ago I upgraded my Macbook Pro Retina 13" Early 2015's SSD to a larger one from OWC: the Aura Pro X. I was pretty happy with the purchase as I was getting 40% higher writing speeds and ...
4
votes
2answers
13k 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 ...
4
votes
6answers
14k views

Is it safe to buy MacBook Pro batteries on eBay?

My 15" MacBook Pro 5.1 (late 2008) battery is inflating to the point of nearly breaking the unibody battery cover, so I'm really into replacing it as soon as possible. There are loads of these ...

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