What is Reddit's opinion of
CoconutBattery 3?
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➔ CoconutBattery 3 website
By popularity on Reddit, this Service is:
87 reviews of this app found across Reddit:
I mean no disrespect. I'm genuinely curious. Why do you feel it easier to ask for a link than to just look up the name? It's practically instantaneous (compared to waiting for a response) and actually less typing than the question. What circumstances make it a better option?
Just to show you I mean no ill will, here's the link. It was the first link to come up on google.
If you have a Mac, there is Coconut Battery. There are some other apps you can get from the iOS app store, but the app I mentioned before runs on a Mac and tells you information about the battery when you plug it in.
You could also take it into a store and have them tell you (not sure how feasible that is for you).
If you have a Mac, download CoconutBattery and then connect your iPad with the USB cable and it will tell you everything about the battery. Cycles, age, capacity etc
I guess the battery is faulty. Normally if you run out of battery it should still have some reserve charge left to keep some data (in this case the correct time), for some time.
You can try to 'calibrate your battery', and/or do a SMC reset or PRAM reset.
Also, you can option + click the battery icon in the top menu bar, it should say the condition it's in. Normal is what it should say.
You can also try a battery app to read out your battery's statistics, like Coconut Battery. It's more detailed.
Otherwise get it looked at by a professional / at Apple, especially if you have warranty.
Leave your MacBook charging while you are using it and don't charge when you are not using it (because if your MB is left too much time charging, it may reduce the battery life). If it's not possible to charge it while you're using it, it's not a problem.
The source is my experience: I've got a 4-year-old 2011 MBP with 86% of battery capacity according to coconutBattery.
You can! Coconut Battery for Mac also shows your iOS device's battery health if you connect it to your Mac while the app is running. http://imgur.com/r5oVFXd
Download coconutbattery and run to see if your battery is around 80% design capacity. Go to your local apple store and tell them you would like to replace your battery due to terrible performance. They'll run a diagnostic and determine if your battery is really shit or not.
Depending on your store, you'll get 1 to 3 options.
- Wait till September to get a free battery replacement
- Pay $289 for a CRU (customer replaceable unit) which could take 2-3 weeks. Some folks reporting that it can even take up to 5 weeks.
- Receive a trade in value of your computer and put it towards a new one.
Everyone suggests taking option 2.
Make sure you have your computer backed up, and tell them that you've backed it up. They'll make you go home with your unit and they'll have to make a CRU order and that can take up to a month.
The CRU unit you'll receive depends on the specs of your computer. A lot of people reported they've received upgrade specs with varying models from 2015, the 2016 touchbar macbook, and even the 2017 models.
It really depends on how lucky you are with your store. Good luck!
Check the health with http://www.coconut-flavour.com/coconutbattery/ after a full charge
If it's below 80% health (im assuming they'll use some sort of similar calculation) and you have AC+ then you'll get some sort of repair done for free. It's still under the main warranty period so possibly they'll see it as an abnormal device and get you fixed up but you should take it in to a store.
On a windows computer and plugging in the iPhone? 3UTools has you covered!
On a Mac OS X desktop or laptop and plugging in the iPhone: CoconutBattery has you covered!
On a iPhone and want to view your battery life with just an mobile app? Battery Life has you covered!
Seriously, check your battery.
I like coconut battery http://www.coconut-flavour.com/coconutbattery/
see what the temperature of your battery is. Also, is your battery swelled? I have a 2010 MBP and this June it was really, really overheating and the battery was swollen enough to push the back panel like a crack. I had known for a while that the battery was prety much a fire hazard, so i finally went and got a replacement.
New sleek battery fits and it was surprising to compare the old one to it - the old one is practically bursting at the seams - so round!
And now I've no problemos at all.
Coconut had been showing 32C temp on the old battery and the new one is only like 26-27C - a huge difference as far as I'm concerned.
Pics, so people can slam me for not replacing the battery sooner:
They have a battery tester that's part of their "MRI" hardware testing. Basically does the same thing as coconutBattery.
If it's under 300 charge cycles and failing it's covered, but it sounds like your's is just old.
Otherwise they'll offer you a $99 replacement that comes with a 90 day warranty or a new one for $129 that has a year warranty.
Apple did something very ugly to the AppStore users, it removed all application tools that can help troubleshoot iPhone ourselves.
Isn’t this terrible ? it’s like removing the possibility to buy a thermometer 🌡 to see if have temperature 🤒
Apple also removed Wi-Fi scanners.
Apple removed coconut (and many useful others) application from apple AppStore, but you still can get the inofmation you what with iPhone connected to a computer.
- With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS device (iPhone, iPad, iPod touch) http://www.coconut-flavour.com/coconutbattery/
Yeah these types of batteries should never be fully depleted. Your batteries cells are probably going bad and not holding 100% of the charge they used to.
If you have a Mac or can get to an OS X device, download Coconut Battery and plug in your phone. The software will tell you what you need to know.
If you're running a Mac, you might also want to check the health of your iPhone 6's battery by downloading an app called Coconut Battery then connect your iPhone to your Mac (via lighting cable) and then click to view the iOS battery.
If you're on AppleCare Plus or your iPhone 6 is still under standard warranty and the iPhone's battery maximum capacity has fallen below 80%, you can bring it into Apple to have it checked and possibly replaced (I'm using "possibly" because the reading on Coconut Battery is an estimate). This past summer Apple introduced a policy where it will replace battery on any of its device running on Li-Ion if the battery health falls below 80% while it's still under warranty.
It sounds as though you have a dead or dying battery which will need replacement. You could use something like Coconut Battery to check the remaining capacity. On your model, the battery is replaceable, but I think you have to get Apple to do it for you.
Run coconutBattery and check the condition of the battery.
I would suggest that the first thing you do after you buy it is nuke the drive and install from scratch. You never know what evil has been installed.
On older devices, lag is to be expected, especially on newer iOS versions (as those tend to be more taxing on older hardware). Also, if you are on iOS 10 or greater, I would check your battery health (as iOS might be throttling your device to prevent random reboots). You can do this with utilities like coconutBattery on macOS.
Now for those broken ROMs (the ones that don't pass the "Game Boy" screen), make sure that:
- The ROM isn't trimmed
- The ROM is for the GameBoy Advance and not for the GB or GBC (extension should be
.gba) - The ROM works in other emulators like GBA4iOS
Also, please PM me the broken ROMs and I'll test them out.
This app will tell you http://www.coconut-flavour.com/coconutbattery/. This link will tell you if your battery is one of the defective ones they shipped: https://www.apple.com/support/iphone6s-unexpectedshutdown/
With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS device (iPhone, iPad, iPod touch) including:
- Age of your Mac, iOS device and battery
- How often the battery was charged
- Your battery health (capacity in relation to the original capacity your battery had when it left the factory)
- and much more...
You got a Mac? Use coconut battery to check the battery life of your iphone http://www.coconut-flavour.com/coconutbattery/
If its fgod then you should backup the phone and better restore in itunes and setup as new iPhone
I know 11 didn't help so that may be your problem... No way to go back now though. If you have a mac you can use http://www.coconut-flavour.com/coconutbattery/ to check the health of your battery to determine if it's the battery or just iOS killing your phone.
I find Coconut Battery to be really good for monitoring battery health, but it is an application that you have to install once set up. I can't think of anything that would allow your mac to be connected to a desktop to check. Another option would be to boot an OS X Snow Leopard installer from USB if the computer is old enough, and using System Profiler to check, although that is a bit limited.
Install Coconut Battery (http://www.coconut-flavour.com/coconutbattery/) and if it says you're under 80% with under 1000 cycles, take it in. The chances are that they'll end up offering you a replacement machine for the cost of the battery replacement.
I have coconut battery for Mac and it's free. http://www.coconut-flavour.com/coconutbattery/
However download Battery Life Pro and see what it gives you if you can't download coconut battery.
Edit: Coconut Battery is a Mac or Windows Program. Not something found in the App Store. Battery Life is something that can be found in the App Store. Coconut battery is more accurate.
Download Cocnut Battery to keep tabs on your Mac Battery's health. Coconut Battery will show you operating temps and voltage as well as the amount of power the battery was designed to hold compared to what it is actually able to hold (this is measured in mAh). This measurement will decline over time with use, as with all lithium ion batteries. Also, Apple has a great article in regards to maximizing performance.
I really haven't paid much attention to the accuracy, but I've been using Coconut Battery for about a week, and it gives time until empty. I checked, and it's not open source, so I don't know how it computes the estimate.
Your battery is designed to retain up to 80% of its original capacity at 1000 complete charge cycles. After that it will continue to degrade more. Post a coconutBattery screenshot.
Don't let it die very often, and if you do, charge it back up to full ASAP. Also, let it die completely every few months or so to keep the battery monitoring system calibrated. (Otherwise you may start to get inaccurate charge readings) Also, if the charging indicator is green (battery is fully charged), and you aren't going to need it fully charged anytime soon, take it off the charger.
Get coconutBattery (http://www.coconut-flavour.com/coconutbattery), and if you want to keep your computer for more than five years, look into replacing the battery yourself. It's not hard, but if you've never taken anything apart before, you might want to let a professional handle it. http://www.everymac.com/systems/apple/macbook-air/macbook-air-faq/macbook-air-battery-replacement-instructions.html
Edit: I forgot to mention ~70% is optimum charge level, and don't let it get too hot (~50°C is probably fine, coconutBattery will tell you the temperature)
along with what /u/guiltydoggy said,.. if you have a Mac.. you can download Coconut Battery and plug your iOS device in and Coconut Battery will show you the iOS devices Battery health info (such as # of battery cycles,etc)
I would recommend Coconut Battery. Checking the load cycles can give you an idea of the battery's age and the design capacity/max charge can tell you how much energy the battery can store vs. new condition.
Doesn't seem too bad. Try something like CoconutBattery to check your battery capacity and post the stats.
Here's mine (15'' rMBP, mid-2012 ): http://i.imgur.com/EUhlqp9.png
It'll take a while so you might not consider it worth the hassle (and neither may he), but you could run an Apple Hardware Test (or it might be an Apple Diagnostics Test for that model). That will tell you pretty much anything wrong with the hardware.
I agree it would also be a good idea to verify disk/disk permissions, but do it while booted into the recovery HD.
Perhaps have him download coconut battery so you can check the detailed status of the battery.
That is about how long my 2012 Air lasted for too. I downloaded coconut battery to test it. My battery was bad and I just took it to the Apple Store and they replaced it for free.
Here the link for the download if you're interested:
The lifespan is measured in cycles. You can find that information by going to System Information (in the Utilities folder) and looking at the "Power" tab, which should give you information about the battery's cycle count, general health and charge. The free app coconutBattery is another way to see that information as well as a bit more.
For whatever it's worth, although a 6.5 -> 3.5 hour decline in battery life isn't out of the question for a three year-old computer that's seen a lot of use, if it's only been noticeable in the last few weeks, along with the computer running hot, that'd suggest there's something else going on. If your computer does have something going on that's making it heat up -- whether that's software (runaway process using lots of CPU or whatever) or hardware (too much dust in the fans, etc.) -- then that can make it use more power, causing the battery life be worse than it should. coconutBattery can help you diagnose that by giving your battery's current maximum charge as a percentage of its original charge. If coconutBattery says that your battery has 50% of its original capacity then a replacement might be in order, but if it says you have 80% of the original capacity, and if some piece of software shows up as using a lot of power in the "CPU" and "Energy" tabs of Activity Monitor, then that'll be your problem.
there's also coconut battery http://www.coconut-flavour.com/coconutbattery/ to check the condition of the battery. Lets you check the number of cycles and capacity of the battery. Also you can check the warranty status of the mac on the apple website https://selfsolve.apple.com/agreementWarrantyDynamic.do
Great list.
I'm not sure if you're accepting MacBook-only software additions to the list, but if you are, can I suggest coconutBattery, a utility that displays your battery health, battery temperature and total charge cycles among other things.
>recently
>second hand
I suspect the battery was replaced by a non authorised repair shop.
Use something like Coconut Battery to check the battery’s actual condition.
22 cycles means nothing until you actually check the health of the battery ie. the full charging capacity. You can download an app called coconutBattery or alternatively download on the Mac App Store, an widget app called iStat Mini. Both will give you the health of that battery (percentage of the original full charging capacity)
The "palmrest" is the top case, it is the keyboard as well as all the stuff around it, minus the trackpad.
The battery is just a big ol' multi cell battery inside the Macbook. So if they are replacing the battery, I would assume that is all they are replacing. It is a pain in the ass to tear the whole thing down and replace the top case. What happened to it to warrant this battery replacement? My Macbook Air is over 4 years old and finally needs a new battery, so what made you think the battery was bad or whatever is happening here?
Here is a tear down of that Macbook:
https://www.ifixit.com/Teardown/MacBook+Pro+13-Inch+Retina+Display+Early+2015+Teardown/38300
Why do you want them to replace the palm rest? Why are they replacing the battery?
Does Apple already have the Macbook or are you planning on bringing it in at some point?
Download Coconut Battery and it will tell you the battery life etc.:
http://www.coconut-flavour.com/coconutbattery/
A 2015 MBPro should not need a new battery already. did you spill liquid in it? Did you drop it?
Yeah but it may be that the battery has a low charge that the phone slows itself down. If the battery hasn’t been replaced recently, then it might be that there’s the course.
Check the battery health with coconutbattery.
Yeah but it may be that the battery has a low charge that the phone slows itself down. If the battery hasn’t been replaced recently, then it might be that there’s the course.
Check the battery health with (coconutbattery.
Do you have another MacBook handy? If so, it would be interesting to see what your replacement battery health is rated at using Coconut Battery - suspect that perhaps the new battery hasn't been registered, and your iOS system still thinks the old battery is in place?
Also +1 on dodgy third party / non-OEM batteries. They're nuttin' but trouble...
I download this program last night : http://www.coconut-flavour.com/coconutbattery/
and I notice that my iPhone 6 battery is low than normal, not sure if that would be standard for that older phone?
It said the originally should be over 1800 Mhz and is below 1600 MHz is that ok?
Do you have a mac? If so, get Coconut Battery - it will tell you a lot about the health of the battery.
Here's a phone that I'm going to take to the Apple store later this afternoon for a battery replacement. Once the cycle count gets up there, the performance will decrease. Luckily this one is part of the iPhone 6s battery recall so I get it for free, but it would only cost $75+tax otherwise, not too bad for another 2+ years of use IMHO.
> Edit: "Replace Now" battery status is now "Replace Soon"
Try give the free app coconutbattery a try. It tells your your battery's condition/and stats
You can download Coconut Battery and it'll give you battery stats, including cycles. Alternatively, Battery Life from the iPhone app store claims to give health info, but I believe it may not be quite as accurate as Coconut Battery.
It’s possible your battery is completely consumed and needs to be replaced. If you have a Mac, you can use coconut battery to determine your battery wear level.
3 things: 1.- check out coconut battery for mac, it will tell you about the health of your iPhone battery. (There are windows alternatives) 2 .- when a version of ios is freshly install, ios will rebuild the spotlight index, photo library scaning, etc. those take a hit on battery, usually is done in 1 or 2 days. 3.- apple has a battery replacement program, it has a cost of course.
Hope it helps.
Try disabling background app refresh and see if that changes anything. Settings->General->Background App Refresh. Also try downloading coconut battery on a Mac and check your battery health.
Not really enough information to say. Battery estimates can be off, but on the other hand batteries do wear down over time.
You can check the "charge cycles" on your battery, which is the number of times you have worn it down. Most Apple laptops since 2009 or so have an expected lifetime of 1000 charge cycles, although in practice they may lose some of their mojo before that. Older Apple laptops had dramatically worse batteries.
You can also download Coconut Battery which will give you more detailed information about the health of your battery (including an estimate of how much life it has).
If you have access to a mac, plug in your iPhone and run coconut battery. It will give info on your battery wear level. You might need a replacement. Link to the app: http://www.coconut-flavour.com/coconutbattery/
Given the age of the iPhone 5S, is it possible that the battery in the phone you purchased is almost at the end of its useful life? I'm assuming you purchased it used? Might want to use a utility like Coco Battery to see how healthy the battery is:
http://www.coconut-flavour.com/coconutbattery/
Apple can replace the battery in the 5S for $79:
What email client are you using, and what browser?
There are many things that go into that energy spending.
Did you try and see what does it say about your battery health in the app Coconut Battery? Not saying that your computer is old, just to see what is up, if you don't think battery life is good as it should be.
I'll gladly help if I can about your issue. Cheers
On a relevant note for future reference, you can also install CococutBattery to check your iPhone's / iPad's (in addition to Mac's) battery and keep track their health over time. http://www.coconut-flavour.com/coconutbattery/
I don't think they were made to be kept on sleep for weeks in a row. The best way for long term storage is to get it to around 50% battery and shut it down.
As for the cause, try seeing if certain features such as wifi and Bluetooth are turned on, as /u/MachDiamonds mentioned. Also, check your battery health. I use Coconut Battery.
Try resetting the SMC. If the battery level is 95% or above when it reports that it is plugged in but not charging, this is normal behaviour. If it's below, disconnect your peripherals to see how it responds. Boot into OS X and install a utility like coconutBattery and observe the battery health; given the age of the machine, it is likely the battery is exhausted and this might also cause the behaviour you're describing.
http://www.coconut-flavour.com/coconutbattery/
Use this tool to check the health of your battery more in depth. It looks fine though, your full charge capacity is higher than my 2014. I got my 2014 last summer and my charge capacity is 5728.
I would agree with most of the comments already made here. If you purchased it this week, from a reputable retailer you should be able to return it in exchange for a different machine. And I completely understand trying to get the best machine you can at a price you can afford.
If it was me and I was going to purchase a new Mac, I wouldn't go without the Retina screen. It's worth every bit to go that direction. Secondly, get as much hard drive space and memory as you can afford. On the new Mac's those are both not upgradable. (although the hard drive can be upgraded if you are technically adept.) But it's better to get all you can when you buy it new.
As for your specific issues, with the battery question. There is an app you can use called Coconut Battery (http://www.coconut-flavour.com/coconutbattery/) that will tell you everything you ever wanted to know about the battery. This will show you the number of cycles the battery has had and more. Run that and you should know the situation around your battery issues.
If you end up sticking with the machine, I highly encourage you to upgrade the hard drive with an SSD drive. I did this on my 2011 Macbook Pro and it gave new life to that machine. It runs very well.
As for the rest of the hardware in the machine, you should be able to see everything you need clicking the Apple logo in top left corner, click About This Mac, then on the new window click System Report. That opens a window that has everything you need to know about the hardware.
I hope that helps!
After that check the battery menu to see if it says something like "replace battery".
If you feel like it, download coconut battery and post a screenshot.
Very helpful resource for taking a look at battery health on old computers. (Only on Mac, though). It says the loadcycle count, design capacity, battery temperature, and other useful info.
It might have entered deep discharge hence it showed you the battery icon and took half an hour to get back on its feet. There's tremendously useful information on Apple's Batteries page that you might want to take a look at.
As for the jumps in battery gauge...as you are jailbroken, you might not get official support. Either restore to current release and call AppleCare/Visit a store for battery diagnostics, or if you're on a Mac, download Coconut Battery and take a look at the charge cycle reported there. It should give you an idea about the wear and tear on the battery.
If the battery looks healthy, a "restore and setup as new iPhone" procedure usually solves battery issues.
I also advise running the latest OS available for your device as most battery-related bugs are squished, but you will lose your jailbreak...
http://www.coconut-flavour.com/coconutbattery/
download that and check out the report. it's a more in depth than sysinfo
ideally a new battery should have 0 cycles (from a third party shop that isn't an ASP i could imagine seeing a couple cycles to account for testing by the vendor and the shop). 720 cycles is when you start to see some noticeable battery degradation and you're entering failure range (yes, rated for 1000 cycles, but many begin to die around 650)
I don't think you're line about the "71%" was there when I 1st read your post.
123 battery cycles .... really isn't that much. (that Year/Make/Model is rated for 1000 battery cycles: https://support.apple.com/en-us/HT201585 )
If it were me..
I'd install Coconut Battery = http://www.coconut-flavour.com/coconutbattery/
I'd drain the battery down as low as possible (until the machine shuts off).. and then charge it up to 100%. And I'd do that at least once a month.
IE = I would "exercise" it a little more judiciously before you jump to any conclusions that the battery is "bad".
They said that the tests aren't conclusive and regardless of them everyone will have a different battery life based on their use. 3 hrs sounds awfully low, especially since the newer MBA's boast 9 hrs but could just be that your GF is a power user. It also could be that the battery is just old. Try running Coconut Battery to get details on that. Personally I've also found hunting down battery hogs using the Activity Monitor helpful; Safari is way more friendly to the battery than Chrome and Firefox uses the CPU even when idling.
Have you used coconutBattery? What's your current capacity?
My battery is 1167 days, 539 cycles, and I have 80% left. According to Apple:
> Your battery is designed to retain up to 80% of its original capacity at 1000 complete charge cycles.
I think if it's just a bit over 1000 cycles and you already have ~50% capacity it might be defect. If it's still around 70-80% then that's normal.
You should try go talk to them anyway. Good luck.
That definitely was happening to me like a few months ago, called up apple support, and they told me to do a restore and it fixed everything. Totally back to normal.
However, if you want to check the status of your battery to see if there is anything actually wrong with it and you have a Mac, you can use Coconut Battery. Just connect up your iPhone to your Mac and click iOS Device.
You can check the battery condition yourself using CoconutBattery (Mac) or iBackupBot (Windows).
These programs will show you the remaining full charge capacity as well as the cycle count.
If you have a mac, there is a great app called coconut battery that will pull the battery stats off of your iPad over USB and you can look to see if your battery has full capacity or if an app or OS is using excessive power. and if you're at <90% capacity before a year is up apple will replace your iPad under warranty.
app: http://www.coconut-flavour.com/coconutbattery/#idDownload
This program will tell you how healthy your battery is. Does it only last 8 hours on standby or is that with frequent use, i.e., if you leave it on overnight, will it run out of battery by morning?
Apple, for example, will replace the battery on your iPhone (and your MacBook, iPad and iPod) if the health of the battery dips below 80% during the iPhone's warranty coverage (that's 1 year of regular coverage or 2 years for EU countries and if you've purchased AppleCare+ extended warranty elsewhere). I believe Samsung offers the same coverage regarding battery with the S6 (replacement if the battery health falls below 80%).
I don't know how to check the battery health on an Android phones but if you're running a Mac, download Coconut battery:
http://www.coconut-flavour.com/coconutbattery/
Install it and then connect your iPhone to a USB port on your Mac:
You really don't need to. Activity monitor is decent built in app which shows details of what's consuming battery. For keeping a log of battery capacity, you can use coconut battery
Do you have a Mac?
If so, download Coconut Battery and connect your iPhone to your Mac. You should be able to open Coconut and check your battery details to see if it needs replacing.
Here's an example
Seriously, everyone should fire up CoconutBattery. It presents everything in a very easy to understand interface, can log capacity (manually) to track degradation over time, and can even check iOS battery lifespans.
Plus, it's free: http://www.coconut-flavour.com/coconutbattery/
Test your battery first using coconut.
It may drain too fast for your liking, but that doesn't necessarily mean it's significantly degraded. Mine is 2 years old and is still at 90% capacity, even though I wish it lasted longer. The problem is often software-related.
I don't really have the same problem, but I noticed that the percentage wasn't as "accurate" as it use to be (MBP mid 2012) when I first purchased it. I have started using coconut battery, which I like a lot. best of luck, sorry I couldn't be more help!
> Could her charge port be frigged or is this more likely the battery itself?
I'm guessing battery. Mine (also on a 4S) has gone to shit these days, and it does show erratic charging and discharging behaviour (might to 40% -> 1% in all of 5mn without using it, with odd charging speed, etc…). If you have a mac, install CoconutBattery, plug the phone in and check the "iOS Device" tab, it'll give you the health of your battery. Here's mine (top bar is current charge and can be ignored, bottom bar is current capacity versus original capacity, the lower it is the more capacity the battery has lost over time): http://i.imgur.com/90ULMV1.png as you can see there's a high cycle count and the battery capacity is shot. Here's the state of the battery for my 5 years old MBP by comparison: http://i.imgur.com/aM3YGKn.png it's suffered a bit, but overall it's in a fairly good state and indeed doesn't show any strange behaviour wrt battery.
I've ordered a battery replacement kit ($25 on ifixit) as the replacement seems reasonably easy. I can report once that's done.
Try coconutBattery. You can upload your data. It should be the most comprehensive database on MacBook batteries. Even if you have just a single data point. You'll see how your battery compares to all the others of the same age (see my graph above).
Li-ion packs have a limited shelve life which is around 5 years for quality packs. Or even more, MacBooks have high quality packs in them. But they simply age, the compound in them deteriorates over time and the max capacity drops. So when you buy a battery look at the manufacturing date.
Early Li-ions lost most of their capacity after a year already. But it's much better nowadays. Batteries are complicated enough. One pack might last 4 years while another one will last 6. Temperature, usage and manufacturer has a huge impact on this. I was issued a Dell work laptop 3 years ago that I've been running down every day. The battery in the machine was shot in under a year.
The information in the link is a little outdated. Manufacturers nowadays use a cycle age model instead of years. A pack is rated for x cycles until the capacity drops significantly. Older MacBooks were rated for 300 cycles. They're at 1000 cycles nowadays. http://support.apple.com/en-us/HT201585
In the end you don't have to micro manage this though. But there are some best practices that will help to prolong the lifetime. It certainly doesn't hurt to leave it on the charger as long as you actually use the battery from time to time. The main thing to avoid is heat (like hot car during summer or bright sunlight for several hours).
With all the advice you've gotten here, I recommend using this tool to keep an eye out on your overall battery life.
I think Coconut Battery is invaluable for that, as you can make logs on charge cycles and overall capacity over time. After owning my 13" MBP since April 2010, I'm still on my original battery because of the tips shown in the thread. And I keep tabs on the battery's overall health using Coconut Battery.
If you're concerned, you can use a tool like Coconut Battery to compare the full capacity of your battery to the intended full capacity for your model.
OP is using Battery Diag from the App Store. You can also try Coconut Battery, which I prefer over BD simply because it doesn't sit on my menubar constantly.
It depends. Your Mac will check for updates occasionally, depending on wifi strength - it may have to use more power to transmit farther away.
Also batteries typically lose about 1-3% a day just sitting. If you think you're losing a lot - you may just need to recalibrate your battery.
http://support.apple.com/kb/ht1490
Also, check out a free utility called CoconutBattery for keeping track of your battery specs.
reset SMC = http://support.apple.com/kb/ht3964
reset PRAM = http://support.apple.com/kb/ht1379
You may also try downloading the free utility "CoconutBattery" = http://www.coconut-flavour.com/coconutbattery/
Maybe also look in Applications \ Utilities \ CONSOLE LOG.. but if the system is just flat powering OFF... then it may not have time to write to the CONSOLE LOG
I'd check out coconutBattery. It allows you to save your battery stats and review them over time. If it seems to be dropping quickly, I'd get it checked out.
If you have a laptop, check out Coconut Battery. My Macbook Air (i5) uses 8-10 watts with normal usage. That means 6-8 macbook airs uses the same amount of power as a standard lightbulb (60 watts). Pretty amazing when you think about it that way.
If you have a desktop, a kill-a-watt meter might be your best bet.
Macs seem to be much more efficient than the PCs my family has had (Dell and HP Desktops). I am sure there are some low power portable PCs, but I haven't been following PC ultrabooks lately.
How many loadcycles does it have? You can check with coconut battery. I had a first gen MacBook (Oct. 2008) that had just over 900 loadcycles, and the battery started acting all weird--holding a charge sometimes but not others, inaccurate remaining charge indications, etc. I went to the Apple store and they said it's only made for 300-500 loadcycles, so over 900 was definitely on the high end. He had never seen over 1000, so I feel like I got the most out of it (I treated it really well for most of its life, never letting it get to zero if possible, charging on a regular basis, that sort of thing). I got a new battery because the employee said that if you push it at that stage, it can overheat and even warp the metal on the bottom of the computer, which is more repairs. And having an unreliable battery is pretty inconvenient. A new one was $99 plus tax. I'd get a new one, or, if your computer is getting pretty old, maybe sell it for a few hundred bucks and get one of the new airs. :)
Since you have a new MBP it is likely that the battery is not yet properly calibrated, i.e. the MBP doesn’t really know how charged your battery is and how long it will last. Let it run down (you can use it during that time) until it goes to sleep and keep the MBP sleeping over night. After the next full recharge you should get better numbers.
If your battery is, in fact, properly calibrated and still shows bad numbers you can look whether anything is straining your battery. Open up Activity Monitor to see which apps stress your CPU. You might also want to turn the brightness down. You shouldn’t, however, have to turn the brightness uncomfortably dim to get those seven hours. If you have to, then there might be something wrong with your battery. (Also, if you don’t get seven hours with wireless turned on don’t try and turn wireless off. Those seven hours include WiFi usage and you should get seven hours with WiFi turned on.)
For a preliminary test check out this freeware. If you don’t want to use this freeware you can check System Profiler (it’s inside the Utilities folder in the Applications folder). Go to Power on the left side and check what it says next to Full Charge Capacity (mAh). If you have a 13" MBP you should have around 5800 mAh, a 15" should have about 7080 mAh. I don’t know about the 17".
If you have significantly less full charge capacity you should talk to Apple and they will replace your battery.
Download Coconut Battery to determine if it's your battery or something else:
http://www.coconut-flavour.com/coconutbattery/
If it reports your battery is OK, check your Activity Monitor application to see if you have any high CPU usage processes running on your computer. The harder your computer works, the faster it uses your battery.
Otherwise if your battery is bad, this can occur due to defects or improper usage. A 2010 MacBook Pro should last approximately 1000 cycles so it's unlikely you've used it's capacity by now.