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Source: view-source:http://www.wikihow.com/Make-Your-Cell-Phone-Battery-Last-Longer

How to Make Your Cell Phone Battery Last Longer

Edited by Markdotnet, Alan J, Bex, Jack Herrick and 104 others

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.

Increase Time between Charges

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Turn the phone off. 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 don't need to receive or make calls but are using a smartphone as a PDA, disable the phone functionality (flight mode).

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.

Follow the method of full charge and full discharge. Don’t put your phone on charging when there is the battery remaining it for another few hours unless it’s very important. Charge it when your battery is about to get totally discharged and when you put it for charging, let it get charged totally. OR Do the opposite - Some Articles [1] indicate that with Lithium batteries, doing shallow discharges and frequent charging prolongs battery life.

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

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.

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.

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.

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

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

Use GSM rather than 3G - Using your phone in 3G / Dual Mode will drain the battery quicker than if you just use GSM mode - have a look at your phones spec and you'll see it will quote two different battery life times - normally 50% more for pure GSM use.

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 ^[1]. When web browsing use sites like Blackl [2] that display a black Google background instead of white.

Prolong the Life of Your Battery

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Initialize a new battery. New batteries should be fully charged before their first use to obtain maximum capacity. Nickel-based batteries should be charged for 16 hours initially and run through 2-4 full charge/full discharge cycles, while lithium ion batteries should be charged for about 5-6 hours. Ignore the phone telling you that the battery is full—this is normal but is not accurate if the battery is not initialized.
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Avoid fully discharging a lithium-ion battery! Unlike Ni-Cd batteries, lithium-ion batteries' life is shortened every time you fully discharge them. Instead, charge them when the battery meter shows one bar left. Lithium-ion batteries, like most rechargeable batteries, have a set number of charges in them.
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Keep the battery cool. Put the battery in the fridge. Your battery will last longest if used near room temperature, and nothing wears on a battery like extended exposure to high temperatures. While you can’t control the weather, you can avoid leaving your phone in a hot car or in direct sunlight, and you don’t have to carry your phone in your pocket, where your body heat will raise its temperature. In addition, check the battery while it’s charging. If it seems excessively hot, your charger may be malfunctioning.
4
Charge your battery correctly, in accordance with its type. Most newer cell phones have lithium-ion batteries, while older ones generally have nickel-based batteries. Read the label on the back of the battery or in the technical specifications in the manual to determine which yours is.
- Nickel-based batteries (either NiCd or NiMH) don't generally suffer from a misunderstood phenomenon known as the "memory effect." As described in Wikipedia and many expert sources,^[2] the term "memory effect" has been widely mythologized to describe any and all deterioration of NiCd (and other battery chemistries), in many cases misleading consumers into further shortening the lives of the batteries through over-discharging to "recondition" them.^[3]
- [This section formerly read: If you charge the battery partially enough times, eventually the battery "forgets" that it can charge fully. A nickel-based battery suffering from memory effect can be reconditioned, which requires the battery to be completely discharged, then completely recharged (sometimes several times). The appropriate length of time between reconditionings varies. A good rule to follow for nickel-battery cell-phones is to discharge them completely once every two to three weeks, and only when you have a charger available.
- Lithium ion batteries can be preserved by careful charging and storing them at a partial charge.^[4] They do not require "reconditioning."
- Regardless of the battery type, use only a charger rated for your battery, and discontinue use of a charger that causes the battery to heat up excessively.
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Store batteries properly. If your battery will be out of use for a while, disconnect it from the phone and store it in a cool and dry but not freezing place (an airtight container in a refrigerator, but not a freezer). Don't keep it with metal objects that might move around and short-circuit the terminals. Lithium ion batteries are not rated to operate at refrigerated temperatures, so let the battery sit outside the refrigerator for at least an hour before using it again. Lithium ion batteries oxidize least when they are stored at 40% charge. Never store a lithium battery at low voltage. Recharge batteries after storage.
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Clean the battery contacts on the battery and on the phone. Over time, contacts may accumulate dirt which reduce the efficiency of energy transfer. Clean them with a cotton swab and rubbing or isopropyl alcohol. If the contacts are two different metals, such as gold and tin, accelerated corrosion known as "galvanic or bi-metallic" occurs. Cutting the corrosion from the contacts often requires solvents, such as acetone or nail polish remover. Be careful: these solvent dissolve plastic, so use a Q-Tip to avoid damaging the battery housing or the phone.

Battery Failure Indicators

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Know how to avoid battery failure:
- The usable time after recharging is shortened.
- The battery becomes unusually warm during a recharge cycle.
- The battery becomes unusually warm during phone use.
- The battery case may become swollen. This is detectable by feeling and viewing the inside/phone-side of the battery case. Also, when the battery is placed inside/phone-side down on a flat, smooth surface, it will rock and will sustain a spin motion. The case of a healthy battery is flat, and the battery will not a spin easily.
- The battery develops a hard spot. This is detectable on the inside/phone-side surface of the battery by gently pinching about the surface between one's fingers.

Tips

When using a car charger, do not charge the battery when the inside temperature of your car is hot. Wait until the car has cooled before you plug in the phone.
You should not have to turn off your phone to charge it. Most battery chargers deliver more than enough current to power your phone and charge it at the same time. Doing so will not lengthen the charge time, and leaving a phone on allows the user to be aware of its fuel gauge, so that you can remove it when the battery is full.
Check to see if your phone has a "Battery Save" option. If so, you can turn this on to increase the life of your battery.
If your phone is connected to your email, make sure it's not set to check your email every 15 minutes or half an hour. This means that every time it checks, you lose a little battery. Set it to where it doesn't check automatically, and you'll save a lot of battery this way.
mAh is an abbreviation for milli-ampere hours which are units of electrical charge. Larger values, for batteries of the same battery voltage, indicate that the battery has a larger capacity and will power your phone for a longer period of time before charging.
Nickel Metal Hydride (NiMH) batteries naturally get quite warm while charging, unless you use a specialized "slow charger". If your phone uses a NiMH battery, do not worry about the heat generated during charging unless it becomes so hot that it is uncomfortable to touch.
While charging your phone, keep it on any non-heat absorbent material such as wooden table, plastic shelf, book, metallic table most effective ( as it is conductor of heat, it takes away minor heat generated by battery).
When you are about to restart the phone for any network malfunction, first try to switch the flight mode ON and OFF, instead of restarting the phone, as restarting the phone takes more battery.
Regardless of how well you care for your battery, it will die eventually. When it does, you may be able to have it refurbished by sending it to the manufacturer or bringing it back to the retailer. If it cannot be refurbished, or if you just want to get a new battery, be sure to recycle it, either by returning it to the manufacturer or retailer, or by bringing it to a recycling center. Most major retail electronics stores have drop-off boxes for recycled phones.
There are numerous battery retailers and discounters that will answer questions you have regarding prolonging the life of your cell phone battery.
Turn power saver on and charge the phone while it is on. Also be sure to not charge the phone too much; it may reduce the life of the battery, requiring you to buy a whole new battery.

Warnings

Do not store a lithium battery with a very low charge for a long time, the battery monitor will draw a small current, which might cause a 'deep discharge' which may cause damage to the battery.
Avoid leaving your phone exposed to the sun. The direct contact between sun rays and your cell phone for a long duration can also affect your battery performance, so try to keep your phone out of reach from sun rays.
Never dispose of old batteries in the trash. Batteries contain toxic metals, and electronic waste from batteries and other electronic components is becoming a major problem. Improper disposal of toxic batteries is illegal in many jurisdictions.^[5]

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