Why is my battery life so bad?

I've had my laptop for just over three years and the battery has become appalling. It lasts for just over an hour without being attached to the mains, and is becoming unbearable.
As a student I'm probably working on it a few hours a week - is it just worn out and doesn't want to work anymore?
Background Info:
Both the adapator and battery itself become quite warm when I'm using it, and I've replaced the adatopor twice (the first blew the circuits in my flat and the second simply stopped working) - could this be part of the issue?
I also know the style of laptop is notorious for the fan becoming over worked (I've had the fan replaced once) and the keys sometimes become sticky (I've had this cleaned when getting the fan replaced).

Have you also had the battery for 3 years? They are consumable and 3 years is a good life. Most 3 year old batteries do not run for an hour. As they get older the batteries do get hotter when charging as they have more electrical resistance.

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How bad is "so bad?" You need to determine the total amount of operating time from full charge to auto-shutdown (ignore any low level alerts that may appear).
I'm not claiming that you do not have a problem. I am stating, however, that we don't yet know whether or not a battery problem exists.

Why is my battery life so bad on my iphone 4s. I signed up for a 2 yr contract with a new iphone 4s. The battery life didn't last a day. I went back to Apple and they replaced it with another iphone 4s. This one is just as bad. The iOS 5.0.1 does nothing!

I have never been so disappointed with an Apple Product such as the Iphone 4s. When I signed up with a new 2 year contract, I received my iphone 4s. I charged it fully the night before, then it didn't even last the day (with minimal usage). I turned off Location Services, Wi Fi, and Bluetooth, this helped a bit. But what is the point of turning these services off, when I NEED THEM!!! The wonderful new Siri doesn't work properly without Location Services turned on.
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If I had of known how bad the battery life is on the iphone 4s, I would have got a Samsung Galaxy 2!!!!!

It doesn't really matter whether I am talking to Apple or not (and I'm sure they monitor these comments), I want everyone to know how bad this new iphone 4s is, and all of it's problems.
Apple have already launched an upgrade to the software - it obviously did not help, as many around the world would concur.
As far as being patient and waiting for another "update in the works" is concerned, it is just not satisfactory. This is not a cheap phone, and those who are experiencing these problems, should not have to be paying a substantial amount of money, for a very smart phone, that obviously, has some serious problems.

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Get gfxCardStatus. It is a free menu bar application that keeps track of which graphics card your MacBook Pro is using at any given time.
<http://www.macupdate.com/app/mac/33905/gfxcardstatus>
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Dont Bother Audre
If you have updated to 6.1.1 and your phone is outside the warrenty perios, then you WILL have issues, so you take your phone to Apple and they will give you a replacement for £139 and they will also say its much cheaper what you paid for your handset!!!!
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Why is my battery life so short on Iphone 4?

Why is my battery life so short on my new I phone 4 with Verizon?

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iphone 4 battery-life so bad after upgrade it (ios5)

gone through this for starters
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HT4137 My battery life is bad.....not getting long on full charge. How do I trouble shoot to see if it's a problem with the battery?

How do I determine if my battery life is bad??

The quickest way (and really the only way) to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter (5W). When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
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http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
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Apple: iPad Battery Nothing to Get Charged Up About
http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
New iPad Takes Much Longer to Charge Than iPad 2
http://www.iphonehacks.com/2012/03/new-ipad-takes-much-longer-to-charge-than-ipa d-2.html
Apple Batteries - iPad http://www.apple.com/batteries/ipad.html
Extend iPad Battery Life (Look at pjl123 comment)
https://discussions.apple.com/thread/3921324?tstart=30
New iPad Slow to Recharge, Barely Charges During Use
http://www.pcworld.com/article/252326/new_ipad_slow_to_recharge_barely_charges_d uring_use.html
Tips About Charging for New iPad 3
http://goodscool-electronics.blogspot.com/2012/04/tips-about-charging-for-new-ip ad-3.html
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
http://thehowto.wikidot.com/prolong-battery-lifespan-for-ipad
iPhone, iPod, Using the iPad Charger
http://support.apple.com/kb/HT4327
Install and use Battery Doctor HD
http://itunes.apple.com/tw/app/battery-doctor-hd/id459702901?mt=8
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HT4623 why is my battery life dieing so quickly

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Why is my battery life worse since upgrading to ios7

After upgrading to IOS7, my iphone 5 battery life is 3-4 hours of standby use, not the expected level. It worked fine for 8 months, then since the upgrade it is pathetic. any ideas why?

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Battery life suddenly bad while idle at 80%

Hey guys,
I have a macbook pro that I got about a month or two ago and the battery life has been great until about two days ago, I used to see a full charge carry for 5-6 hours now it's 2 hours if i'm lucky, as far as I know the only thing that has changed is installing apple updates which I doubt would cause my battery life to tank suddenly. My running conditions haven't changed, i've usually got the backlight low with dim keyboard light, wi-fi on and not running anything intensive as you can see below, just a code editor and some communication programs.
here's sample output from running top in a terminal
Processes: 87 total, 5 running, 82 sleeping, 472 threads                                                                                                                                                                            12:20:54
Load Avg: 1.24, 1.21, 1.13 CPU usage: 7.79% user, 5.19% sys, 87.1% idle SharedLibs: 7652K resident, 8160K data, 0B linkedit. MemRegions: 13809 total, 1109M resident, 32M private, 364M shared.
PhysMem: 894M wired, 1318M active, 243M inactive, 2455M used, 1635M free. VM: 193G vsize, 1040M framework vsize, 191238(0) pageins, 0(0) pageouts. Networks: packets: 35325/18M in, 32604/6758K out.
Disks: 80275/1782M read, 22422/744M written.
Here are the specs on the laptop
Hardware Overview:
Model Name:          MacBook Pro
Model Identifier:          MacBookPro8,2
Processor Name:          Intel Core i7
Processor Speed:          2 GHz
Number of Processors:          1
Total Number of Cores:          4
L2 Cache (per Core):          256 KB
L3 Cache:          6 MB
Memory:          4 GB
Boot ROM Version:          MBP81.0047.B04
SMC Version (system):          1.69f1
Serial Number (system):          C0***V
Hardware UUID:          0DCE12E1-6114-53C0-B618-CB75D451C706
Sudden Motion Sensor:
State:          Enabled
Does anyone have any insight or tools I can use to diagnose this further?
Thanks!

I tried that last night to no avail, but I found the answer. The dock had been running at 100% after the upgrade (don't know why it didn't show up in top, but showed up in activity monitor) so I followed this thread ( https://discussions.apple.com/thread/3138432?start=0&tstart=0 ) and now I'm back to expected battery life

After 4.2.1 Dropped/Choppy calls and poor signal / Gets hot / Battery Life is bad when talking

What is this APPLE? I can see the Iphone 3G is old and no more support but atleast make a working OS and then go out on a high note. Instead of leaving us hanging with a broken phone. Not just me , scores of others have these very same symptoms. Also I wish there was a way to go back to an older OS , one that worked %100 for my phone.
Dropped/Choppy calls
Get REAL warm
Batterylife is crap only when talking
Never had these problems before 4.2.1 , it's like night and day. I was hooked on the Iphone since I bought this 3G brand new and its ease of use but Ill tell you one thing....
Im not under contract right now with anyone
I WILL NOT be buying a phone/contract with APPLE as long as 4.2.1 is left in our "lap".
I WILL be buying another smartphone if this is what we are left with. I was going to treat myself and buy the 5G with a contract to make it cheaper but as of now
Im feeling "used" by APPLE and not going to take it.
I know some might come here and post ..
"Me and others aren't effected by 4.2.1 , must be your phone"
BS! It was night and day when I downloaded/installed 4.2.1. This is NOT my Phone and IS the firmware. And my friend that is a phone nut said he didn't download 4.2.1 because of all the problems he was hearing about it, I should have done research. He said the biggest hit was the 3G and he can't belive I installed it.
APPLE DO YOUR JOB AND FIX THIS. MAKE 4.2.2 ATLEAST AND FIX THESE PROBLEMS!! IF NOT THEN WE MUST PART WAYS.
                                                            DamianJP

Cool
Did the new device and didn't do a restore from backup. Grabbed all my contacts from windows contacts saved list. So only thing the same on the phone was the same 4.2.1 that stays in there. Still bad signal and battery life, although the battery problem might be the age of the battery since its the same battery that came with the 3G.
I did the Field Test mode program
http://socialtimes.com/find-your-iphones-signal-strength-using-the-hidden-field- test-mode_b4690
- Open the iPhone’s dialer keypad
- Enter *3001#12345#*
- Press the Call button
-80 to -70 dBm: Reasonably strong signal
-107 to -90 dBm: Weak signal
-113 dBM: No serviceable signal
In my house im getting any were from -100dBm to -117dBm ( 1 to 2 bars with 3G)
Outside Im getting -85dBm and up. (2 to 4 bars with 3G)
I have to do more testing to get solid numbers though. I got almost full bars all the time if I switched to EDGE.
(4 to 5 all the time with EDGE). That makes me think that with the problem in 3G , it's the OS. Since ALOT of people saying that there 3G drops or is bad since 4.2.1.
Now I looked around and I playied with all my settings to insure that my battery should not drain thru improper settings. So I think given this is the original battery , it might be a good time to try and install a new one from here for $17.
http://www.iphonebatteryrepair.com/iPhone-3G-Battery-p/bat-1001.htm
Iv'e opened Iphones before (fixed my friends 3G) after he dropped his and the vibrate/silent button's screw came loose and he could not change it off silent mode and replaced a battery in my other friends 3Gs. SO i feel comfortable in there.
I dont know if the bad battery could be reducing my signal.Ill try the battery cause it's only $17 (Cheap investment) and because my battery life under a load drains it fast. Again I don't know if it's the OS or the age of it.
I was thinking maybe a poor contact/condition of my SIM card could be another possibility. I wonder if and how much a new SIM card from a AT&T provider is. I heard people saying you can get a new one but Ill have to ask my local AT&T dealer.
Although this seemed so odd how it all happened the same night till now RIGHT after the 4.2.1 OS install and all the others people saying the same symptoms.
Ill keep working with it and give you (and others users here) updates in my progress for the people who are in the same "boat" as me.
By the way I haven't tried to make Itunes re download the OS by deleting the file in the directory you gave me above. Ill try that as soon as I post this message.
Also Iv'e noticed that theres a way to download a older version of Firmware OS and put it in a certain directory and use the DFU mode (Deep Firmware Upgrade) on the Iphone to force the Iphone to re install the current version or an older version ( whatever version you download) of firmware. Now Im very worried that this might mess my Iphone up to were it wont even work so I really dont want to try this right now or until I exhaust all my other options. I have to do more research of this method.
Sorry for the long post but I think I kept it faily organized for a easy read, I hope.
                            Thank You Ingo !!
                                        DamianJP

Is the Iphone 5 Battery Life really bad?

I'm planning to get a Verizon Iphone 5 but I'm a little hesitant because of all the battery life complains I read in the internet, is it true that the battery loses 10% charge every 15 minutes under normal usage?! does the battery life lasts only for 5 hours maximum and not the 8+ hours as Apple said? please help me.

it is true very bad battery

Why is my battery life so bad?

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