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Cell phones have come a long way over the past decade. Things we didn't even think were possible just years ago, such as video calling without a computer from virtually anywhere in the world, are now possible thanks to smartphones. But even with all the added functionality and mind-blowing specifications, one area has yet to really improve: battery life. And it's becoming a rather large hurdle for mobile manufacturers to overcome.

It never fails. A company can release one fine piece of equipment, one with every feature and spec exactly to my liking, as if it were made-to-order just for me. It can have a big, vibrant, crystal clear display, impressive camera, flawless performance powered by a dual- or quad-core processor, LTE, ample RAM and storage, etc. Yet the battery life just isn't up to par. I feel as if I'm constantly tethered to a wall, charging my phone so my battery is good to go for at least another few hours.

Aside from the DROID RAZR MAXX, which actually packs nearly double the capacity of competitors' batteries in its cell, this has been the case with almost every phone in recent memory. It's the same story every time: unplug the phone in the morning, use it lightly over a few hours and plug it back in before you leave so it won't die before you make it back home.

And, to date, I've done everything in my power to try and fight terrible battery life. I have carried two and three spare batteries with me every day for months before. (And yes, I have managed to kill the main battery and all the spares in a single day.) I have carried battery pack chargers in my pockets. And I even wear a backpack that charges my phones and tablets, called a Powerbag, from time to time.

To no avail, I have also tried almost every application that claims to improve your phone's battery. I used to believe task killers would prolong my battery life, that is, until I learned they can do more harm than good. I've tried Juice Defender to little to no effect and a plethora of similar apps.

In the end, the verdict is always the same. My phone's battery life still sucks and little is going to change that until there is a major breakthrough in battery tech.

Last week, however, a new application entered the scene with a slightly different take on improving battery life. Created by UC Berkeley's AMP Lab, Carat aims to improve your phone's battery life intelligently. According to the Carat site:

"Carat is a research project that aims to detect energy bugs---app behavior that is consuming energy unnecessarily---using data collected from a community of mobile devices. After running Carat for about a week, you will start to receive personalized recommendations for improving your battery life."

Instead of just sending recommendations to kill a rogue application that may be chewing up more CPU usage than normal, Carat runs in the background and monitors the energy that different applications, services and processes consume. It then sends that information to a Spark application running on Amazon Web Services for analysis. The Carat website explains further: 

"These measurements are sent to our servers, which throw them into a big statistical stew and try to infer how devices are using energy and under what circumstances. The results of these analyses are then sent back to the app, which can give you feedback and actionable advice about how to improve your battery life."

And instead of just killing off applications or processes, it gives you an estimated time that killing that particular app or service will extend your battery life. As you can see in the above picture, killing the Google Voice dialer, or GVDialer, will extend my battery life by approximately one hour and three minutes. Likewise, killing the stock Camera app will extend my battery by 38 minutes.

I've been using Carat for several days now. I can't say it's improved the battery life of my iPhone 4S drastically – you're not going to jump from 12 hours per charge to 24. But there is a slightly noticeable difference. As soon as the percentage indicator in the status bar starts to drop a little faster than normal, I fire up Carat and tick off some of the recommended actions. Carat is more to prevent unnecessary energy consumption – or battery drain – than anything. Either way, it seems sort of promising.

I have also installed Carat on my HTC One X, but it has yet to gather enough data to make recommendations; it generally takes about two days to a week to gather enough information to recommend anything. I plan to use this alongside Watchdog, which alerts me when an application is using more than a designated percentage of CPU, and weed out any applications that are constantly sucking up too much juice.

I've been around the block and I've sort of lost hope on apps like these. But Carat seems different. This is a research project by UC Berkeley, so, other than data and results, they have nothing to gain from this. I will continue to use Carat until I notice any negative side-effects. So far, so good.

What about you, ladies and gents? Have you used any applications to prolong your battery life? If so, which ones? And how have they worked for you? Have you tried Carat? Share your thoughts and battery-saving app experiences below.


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37 Reactions to this post

"Is battery life terrible for you?"


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Gerald Mccrae
Gerald Mccrae I have the razr maxx and can get two days out of it if I turn off LTE in fact I hate LTE there only good for killing your batter
Han Lee
Han Lee No i just use 2 extea batteries lol
Wendy Lindop
Wendy Lindop No, those apps use battery trying to save battery!
Carlos Nava
Carlos Nava My Epic 4G touch gives around 15 hours so I guess I'm all good
Srivathsa Chakravarthy
Srivathsa Chakravarthy I've recently bought Samsung Galaxy Nexus. The bulk of the battery is consumed by the Screen itsself...any suggestions?
Bernie Fen
Bernie Fen using MT4G and it's an "OK" but not great.
Stephen Wagner
Stephen Wagner Ive been using easy battery saver
John Jenkins
John Jenkins I'm at 40% on my iPhone 4, what apps are good for prolonging battery life?
Carlos J Cevallos
Carlos J Cevallos Why we call it smartphones if you have to download an app to manage your battery consumption which sucks ass on my Motorola RAZR.. lucky if i make 5 hours out of it..
Robert Centennial
Robert Centennial screen on time is the battery killer. no apps for that
Carl Wiest
Carl Wiest Lovin it.
Carl Wiest
Carl Wiest My new EVO LTE is the shiz for battery life!
Michael Stern
Michael Stern I have a DROID RAZR MAXX and i barely make one day out of the battery. I hate when phone companies lie about their product.*cough* MOTOROLA
Tabib Rehman
Tabib Rehman Whatsapp used to drain my battery
Jeff Hood
Jeff Hood Battery life is my main gripe with my Atrix 2
Chad Forthman
Chad Forthman My phone five to six hours.
Jason Launius
Jason Launius Nope Razr MAXX
Juan Carlos Munoz
Juan Carlos Munoz Smart phones my ass. It's pretty stupid that i have to manage my battery consumption
Clifton H. Williams II
Clifton H. Williams II Hell to the yes!
Garrett Vincent
Garrett Vincent Root and flash cynogenmod9 gain control over your phone
GoGo Mix
GoGo Mix no, i just bought one more batt for emergency case
Humberto Rubio
Humberto Rubio Don't know how people get 32 hr but I'm super heavy user and I get about 13-14 hours which for me is amazing Lol HTC one x
Hanamichi Kurotsuchi
Hanamichi Kurotsuchi yes I am using Ultimate Juice Defender ( the icon of your link ).
Frank Porter
Frank Porter nope, battery life is fine on my Galixy Nexus
Devon Henry
Devon Henry juice defender is the way to go. the free app can double battery life easily.
Antonio L. Lopez
Antonio L. Lopez Don't need it on My Bentley,NOKIA LUMIA 900 is a TOP FUEL no matter what and never run LEAN,,,LOL
Jeff Irvine
Jeff Irvine It's unnecessary anymore.
Tony Abiama
Tony Abiama Not so hot on my Galaxy Nexus
Gary Junior
Gary Junior Nope, I always find my battery dies even faster with it on
Justin White
Justin White mine is great on my GS2 skyrocket!
Wasis Waskito
Wasis Waskito Love my TV REMOTE, it's 2 years long.
Joshua Rodriguez
Joshua Rodriguez Negative, easily get 36+ hours with my HTC One-X!
Danu Carrión Perales
Danu Carrión Perales Lol! It takes 12-15 hours for my sgs 2 to take only 10-15% of the battery!
Chase Millar
Chase Millar love my MyTouch4G, mega power! & a extra battery ;)
Dustin Newton
Dustin Newton No two full days on my RAZR maxx love this phone for this reason
John Cruz
John Cruz no I got the droid razr maxx
Jerry Tan KL
Jerry Tan KL juice defender helps alot




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