Mobile Battery Saving tips

If you're expecting a call and your battery icon starts blinking, the first thing you should do is find a charger. But if that's not an option, here are ten things you can do to hang on. We'll skip the usual tips about the 'memory effect' and which battery type is better  NiCd or Li-Ion  because you don't really have a choice in that.

Close Background Applications
If you're using a Smartphone, close applications that you don't need. Applications that stay active in the background use up a bit of CPU, which uses up battery. Make sure you 'exit' the applications from the menu, not by pressing the 'End' key, as that merely puts the application in the background. In Series 60 Smartphones (mostly Nokias), hold down the 'Menu' key to get a list of all applications running in the background to close them. In Windows Mobile 5 phones, open the 'Memory' application and check the 'Running programs' tab to close them.

Turn Down Screen Brightness
The screen is one of the most power-consuming parts of the mobile phone. The lower the brightness, the lesser power it needs. Keep it as low as you can, so long as you can still see it! Also, some phones like the E61 and the BlackBerry Pearl come with auto-adjust features that increase the brightness in brightly lit areas and dim it in low-light areas. If you're setting the brightness low, make sure that auto-adjust is turned off.

Don't Use Animated Wallpapers or Screensavers
The animations in wallpapers and screensavers can drain a bit of battery as they also consume a wee bit of CPU. Turn them off.

Turn Off Keypad Lights
If you've been using the phone for a while, you may be able to use the keys without seeing them. If this is the case, the keypad backlight can be turned off. However, not a lot of phones support this, but it's worth considering if your phone does.

Decrease Screen Standby Time Out
The time till your screen dims out and/or gets turned off is configurable in most phones. 10 seconds is good, 5 seconds is better. Set it as low as you can go without it becoming inconvenient.


Turn Off Vibration
Probably the second most power-consuming feature of any mobile phone is the built-in vibration alert. See if you can do without it.

Turn Down Ringer Volume, Keypad Tones and Speaker During Calls
If you're mostly indoors, like in the office or at home, a low ringer volume can go a bit towards saving your battery. Most phones also have DTMF-like keypad tones, which are not necessary if the keypad has decent tactile feedback. I keep them turned off most of the time  you can try it too. Volume of the earpiece when you're on a call can also be lowered, and that helps too.

Disable Voice Clarity / EFR / Voice Privacy
Almost all phones now do Enhanced Full Rate (EFR) for voice communication that consumes a little more power. In most cases, the enhanced quality of EFR doesn't make a difference thanks to the high noise levels in our city. Keep it off, you probably won't miss it. Some phones (mostly Samsungs) have a 'voice privacy' feature which can also be turned off to save battery.

Turn off 3G / GPRS / EDGE
Most 3G/UMTS/WCDMA phones keep searching for 3G coverage by default. In India, they'll keep searching till 2008, draining your battery, so go to the network selection screen and choose GSM-only. If your phone has a secondary camera near the screen, it's a 3G phone. Check your phone’s specs on the website if you aren't sure. Sometimes, even regular GPRS or EDGE connections stay active in the back, so make sure you specifically disconnect when you're done browsing the web.

Use Bluetooth and WiFi Only While Transferring
If you only use Bluetooth occasionally to transfer files to and from other devices, there's probably no point keeping it on all the time. Most phones only come with an on/off setting for Bluetooth, unlike the 'Turn on for 10 minutes' setting available for Infrared in some phones (mostly Sony Ericssons). People tend to forget about Bluetooth being left on after transferring the file  avoid doing this. Same goes for WiFi, if you're phone has that.

Here's another tip  find a USB cable if your phone supports recharging via USB. The Motorola RAZR/KRZR/SLVRs and most Windows Mobile Smartphones have a standard miniUSB slot that can use the same cable as most digital cameras. You're more likely to find one of these lying around somewhere than a charger for your phone, unless it's a Nokia, of course.

Finally, the last tip is not very recommendable, but it is something to consider if you've tried everything else above: don't use the phone too much. Of course, you can't use the camera and media features (most Samsung phones won't even let you, if the battery is low) but you can also be a bit choosy while answering incoming calls  not all of them need to be answered. This is even more true in case of unknown numbers!

Nokia Quality Checking

This is why u must use Nokia phones

I've long suspected that the best job ever would be to work in product stress testing—because you basically get paid to break shit all day. Nokia sent over a bunch of info detailing how their test centres operate, leaving me fully convinced this would indeed be my dream gig. Not only do they run over 200 mechanical tests on these things, but where else could you play with a bunch of machines that bend, bake, humidify, spray, poke and drop phones? (And yeah, that phone in the picture above just got poked a million times...literally. )

Here's a look at a handful of different tests and what each one tries to accomplish.
Liquids

Nokia places a phone under a bunch of needle-sized water dispensers and then lets it drip all over the phone, which tests for resistance in situations like rain, or splashing from a pool.
The humidity simulation, which tests the durability of phones in up to 95% humidity, is helpful in determining if a phone will hold up in particularly damp areas like South and Central America, where gadgets don't have the longest lifespan.

Nokia also tests how the phone reacts to various liquids, creams and gels (lotions, hand sanitisers, etc...), since stuff like that tends to accidentally spill while sitting in a purse or backpack with the phone.
Sturdiness

Tests for bending and twisting are pretty straight forward and self explanatory. Still, you can't help but cringe to see a phone placed in such an unnatural position. Nokia says when you have your phone in your back pocket and you sit on it, it's susceptible to bending.

One of the cooler stress tests that exists is the Drop test—not only because it uses a giant friggin' machine, but also because they record the drops using a camera that can record 100,000 frames per second, which is 3,000 times faster than the normal video camera. The videos are then analysed frame by frame, determining the degree to which a device becomes distorted upon impact. Check it out.
When Nokia drops a phone, they drop it from about the height of a shirt pocket onto concrete, since that's a likely scenario for dropped phones. They also attatch a phone under a steel device that pushes down 100 newtons of force.

Wear and Tear
Nokia has a series of wear and tear stress tests, when gauge the phone's ability to take bumps, scratches from daily use. Dust testing involves throwing a handful of phones in a dust filled box and letting everything co-mingle. How much dust gets inside? And do buttons stop working when foreign substances get under the surface? This is where you find out.

They also let phones roll around in a bunch of pieces of hard, pointy plastic to see where it might scratch, scuff or crack under duress. These pieces are like plastic chocolate chips and bite-sized pyramids, and they're pretty sharp. This phone met an unfortunate demise in the name of quality control

Other weird tests include rubbing a piece of denim up against a phone to test the effect of friction when the phone rubs up against your clothes and subjection the phone to temperatures ranging between -40 and 85 degrees Celcius; this determines whether or not the phone can survive in the most extreme conditions on earth.
When testing is finished, they have a battery of analytic procedures to determine how well or how poorly a phone held up. This includes analysing a phone under electron microscopes, 3D X-rays and X-ray Spectroscopes to check for any related damage; possible micron-sized soldering cracks, component failure or any breakdowns in the materials.

As you can see, these tests aren't lightweight by any means, and most of my Nokia phones over the years have been pretty durable. What about yours?