How To | Maximize battery life on your Android

One of the criticisms Android has received plenty of flak for is its comparatively low battery life compared with other smartphones.

Google’s Larry Page blames third-party applications, and in his words “If you’re not getting a day of Android battery life, there’s something wrong.”

Most of the instructions below don’t necessarily require you to be running a rooted phone, but it will help if you are.

Disclaimer: Root your phone at your own risk. I am not responsible if you screw it up and are left with a paperweight.

Step 1. Do a full discharge and clear your battery stats

In theory Lithium-ion batteries don’t suffer from memory effect, but Battery University still recommends that a full discharge should be undertaken every 30 cycles or so to ‘reset the fuel gauge.’

Basically, the software has an idea of how much juice is left in the battery, over time this measurement can become inaccurate and the software may start telling you the battery is running out when it’s actually not.

To alleviate the problem, discharge your battery completely until the phone shuts off and it won’t turn back on, then charge it back up to 100%.

Rooted users, you can go one step further. Once your phone is recharged to 100%, boot into your recovery of choice and hit up the Wipe option, then “clear battery stats.”

Now unplug your phone and use it as normal until it is fully discharged again, then charge it back up. This will give the software a more accurate idea of the capacity of the battery, and your life should increase dramatically.

Step 2. Reduce the refresh rate for applications

If you have Facebook, Twitter, any News or Weather app, Mail, or anything else that periodically checks the Internet for new information and updates, adjust the settings to a realistic refresh time.

You probably don’t need Facebook to update every 15 minutes, nor do you need to be notified of new Twitter mentions instantly. It may seem crazy, but these services constantly using WiFi or mobile data sucks up a ton of that precious energy. Change these to a realistic value and enjoy another hour or so of battery life.

Step 3. Turn off Market notifications

In the same vein as the above tip, head to your Android Market, then the Downloads section. Now hit the Menu key on your phone and tap Notifications. Select “Do not notify me” to turn off the auto-checking of updates.

Step 4. Underclock that CPURoot Only

This is for rooted users only, and yet another benefit of rooting your phone. If you’re running SetCPU and have your phone overclocked, why not try underclocking it to save some battery?

Set the minimum frequency to the lowest it can go, and then change it to “OnDemand.” SetCPU will automatically flick around the CPU clock speed when it’s needed – 9 times out of 10 (depending on your usage) the phone will be chilling out in your pocket on standby, so you probably won’t need that CPU running over-time.

My average battery temperature reduced from 35C celsius to 24C after I changed the CPU to “OnDemand.”

Note: Be careful when changing settings in SetCPU. I’d highly recommend unchecking the Set on Boot option when playing around, if your phone doesn’t like a certain clock speed and locks up, at least you’ll be able to hard reset and get back to where you are.

Step 5. Disable widgets and live wallpapers

Widgets and live wallpapers use up a bit of juice. If you really want to prolong your phone’s battery, turn them off.

Step 6. Change the WiFi sleep policy

WiFi uses up a ton of battery, so rather than have it on all the time, why not set it to come on only when you need it?

Hit up Settings > Wireless & networks > WiFi settings and then press the menu key on your phone. Select Advanced, then Wi-Fi sleep policy. Change it to “When screen turns off.”

This will save a ton of battery. Don’t believe that WiFi is a big hog? Check out what’s using your battery the most by hitting up Settings > About phone > Battery use.

Step 7. Reduce your display brightness and the screen timeout

This should be an obvious one – below WiFi, your screen is the biggest battery hog. Change the brightness to “automatic” if you’re lucky enough to have a phone with a sensor, or reduce it under Settings.

You should also reduce the screen timeout under Settings > Display > Screen timeout.

Step 8. Keep your phone out of the sun

It’s pretty common knowledge that heat degrades battery life exponentially, so don’t leave your phone lying about in the sun* or in the car when you head off to the pub on a warm afternoon.

Step 9. Turn off GPS and Bluetooth when you’re not using them

Pretty self-explanatory. GPS is a battery hog, and chances are you’re not going to be using it 24/7. Same goes for Bluetooth. Turn them off, and enjoy the benefits of a slightly longer battery life.

Step 10. Switch to 2G networks

If you don’t use much data and want your phone to last as long as possible, consider switching to 2G networks only. Under WiFi & network settings > Mobile networks check the option “Use only 2G networks.”

Thank you to OMG! Ubuntu for these tips

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