While many of us now use mobile phones
instead of land-line phones in our homes, these
mobile phones come with lithium batteries which
require some maintenance as long as they are
used. Once you know how, you can optimize your
phone's battery life fairly easily.


Increasing the Time between Charges


1)Turn the phone off. Only do this if it's
going to be for several hours; turning a
phone on/off actually uses a massive
amount of power itself. This will probably be
the most effective and simple way of
conserving your battery’s power. Why? This
will help conserve energy and also charge
your phone. If you don't plan on answering
the phone while you're sleeping or after
business hours, just turn it off. Do the same
if you are in an area with no reception (such
as a subway or remote area, since constantly
searching for service depletes the battery
fairly quickly).
Some phones have an automatic power
save feature, but it takes about 30
minutes with no service to kick in. By
then, much battery power has been
used. If you are using a smartphone
and have no reception, disable the
phone functionality (flight/airplane
mode).


2)Stop searching for a signal. When you
are in an area with poor or no signal,
your phone will constantly look for a better
connection, and will use up all your power
doing so. This is easily understood if you
have ever forgotten to turn off your phone on
a flight. The best way to ensure longer
battery life is to make sure you have a great
signal where you use your phone. If you don't
have a perfect signal, get a cell phone
repeater which will amplify the signal to
provide near perfect reception anywhere or
simply turn on flight (airplane) mode (as said
previously).


3)Do not follow the method of full
charge and full discharge. Avoid letting
your cell phone's battery run all the way
down. Unlike nickel-based batteries (such as
the NiCd or NiMH rechargeable AA batteries
seen in most supermarkets), lithium-based
batteries are designed to be charged early
and often, and letting them get too low can
damage the battery. With lithium-based
batteries, doing shallow discharges and
frequent charging prolongs battery life.


4)Switch the vibrate function off on your
phone. Use just the ring tone. The
vibrate function uses additional battery
power. Keep the ring tone volume as low as
possible.


5)Turn off your phone's back light. The
back light is what makes the phone
easier to read in bright light or outside.
However, the light also uses battery power. If
you can get by without it, your battery will
last longer. If you have to use the back light,
many phones will let you set the amount of
time to leave the back light on. Shorten that
amount of time. Usually, one or two seconds
will be sufficient. Some phones have an
ambient light sensor, which can turn off the
back light in bright conditions and enable it
in darker ones.


6)Avoid using unnecessary features. If
you know it will be a while before your
phone’s next charge, don’t use the camera or
connect to the internet. Flash photography
can drain your battery especially quickly.


7)Keep calls short. This is obvious, but
how many times have you heard
someone on their mobile phone say, "I think
my battery’s dying," and then continue their
conversation for several minutes?
Sometimes, the dying battery is just an
excuse to get off the phone (and a good one,
at that), but if you really need to conserve the
battery, limit your talk time.


Turn off Bluetooth. It will drain your
battery very quickly. Only turn Bluetooth
on when needed.


9)Same goes for WIFI, GPS, and infrared
capabilities, if your phone has these
features built in. Keep them off except when
you need them.


10)Turn the brightness of the display to
the lowest setting possible.


11)Adjust your network settings when
possible. Use 3G (HSPA, HSPA+,
UMTS) or 2G (GSM) rather than 4G (LTE).
Using your phone in 4G will drain the battery
quicker than if you just use 3G or 2G. Turn
4G (LTE) off when there is weak to no 4G
signal in your area. When using 4G, both the
3G and 4G radios are turned on therefore it
will use a lot of power. You may also turn off
3G and use 2G if there is weak to no 3G.


12)With a smartphone, avoid using
moving or animated pictures or
videos for your background. Animated
backgrounds will drain the battery faster.
Use a black background whenever
possible. AMOLED screens use a lot
less power displaying black instead of
white.

Source?

Some phones have a good battery o

Worksunlimited:
Source?

I did some findings myself

You might as well disable all apps (or, at least, just a few of them) running in the background, because those also can drain a lot of battery.

HarveyDeven:
You might as well disable all apps (or, at least, just a few of them) running in the background, because those also can drain a lot of battery.

Exactly..