Mobile computing has got better with lighter components, better chips and faster processors. But the Achilles heel of a laptop has remained its battery. So here are we are going to look at ways to improve laptop battery life.

Modern graphic intensive operating systems and resource hungry applications are cutting down the life of your laptop’s battery every day. The average battery life per continuous use still stands at a maximum of three to four hours. So, a fast depleting battery could very swiftly put the crutches on your ‘mobile’ road trip.

There's still plenty to learn when it comes to getting more juice from a charge and extending your battery's overall life.

So, yes, there are tips that most of us know:

1. Dim your screen.
2. Minimize background processes.
3. Don't use the CD/DVD drive.
4. Disable your wireless antenna when not in use.

But there's still a lot you may not know about battery technology and the things that both help and hinder your laptop's juicebox.

Getting More Minutes per Charge

1. Turn off ports. Disabling unused ports and components, such as VGA, Ethernet, PCMCIA, USB, and yes, your wireless, too. You can do this through the Device Manager or by configuring a separate hardware profile (see next step).
2. Create Power-Saving Hardware Profiles. Configure your laptop for the various scenarios in which you use it (on a plane, at the coffee shop, at the office, and so on). You can do this through the Hardware Profiles menu by right-clicking on My Computer and selecting Preferences or by using a freeware utility such as SparkleXP (for Windows XP users).
3. Configure your display to turn off when not in use. This is different from just using a screensaver, because in many cases a screensaver still requires the display's backlight to be on. You can set the interval to turn the display off in Windows' Power Options—found in the Control Panel.

Extending the Laptop Computer Battery Overall Life

The easiest way to give your battery an early death is to damage it. And the two most common causes of damage are from overheating and using an AC adapter with the wrong voltage. For that, make sure to check the voltage of your adapter, especially if using a replacement adapter. Here's how you prevent overheating:

1. Use a cooling pad when using a notebook computer on your lap.
2. Avoid propping your laptop on a pillow, blanket, or other soft surface that can heat up or block cooling fans.
3. Clean your desk. It sounds strange, but if you have a dusty, dirty desk, that dust will get into the vents and clog the cooling fan. Once the dust is inside your laptop, it is much harder to remove. You can try blasting it out with canned air, but you run the risk of damaging internal components. You can also remove the vent and clean out the grit, but remember that taking apart your laptop can void the warranty. So clean your desk at least once a week, if not daily.
4. Try not to store your laptop in a place where the air temperature exceeds 80 degrees Fahrenheit, such as a hot car or an outdoor patio. And if your laptop heats up or is cold, let it return to room temperature before starting up.
5. Consider taking your battery out when using your laptop plugged into AC power. Just make sure to keep the contacts clean. If you need to clean them, use rubbing alcohol.
6. For lithium ion batteries, you do not need to discharge them fully and recharge constantly. Since they don't have the same "memory" as older nickel-metal hydride batteries, it is actually better to discharge a lithium ion only partially before recharging. You need to do a full discharge only about every 30 charges.

Picking a Laptop for Maximum Battery Life

If you're in the market for a new laptop, there are features and components you should consider to get the most mileage from the system's battery.

1. An ultra-low-voltage processor, such as the Intel Penryn or one from VIA's line of ULV processors.
2. A solid-state storage drive, which requires less power and, since there are no spinning parts, will suffer less wear and tear than a traditional hard drive.
3. An LED display. Although pricey, LEDs use much less power than LCD.
4. A smaller screen. A smaller screen means a smaller backlight, which will also save on battery drain.

According to Andrew Bradner, product line manager for APC, all lithium ion batteries are not created equal. The proof is in the pudding, or in this case the chemistry. Unfortunately, it is almost impossible to discern if the battery you're buying was manufactured in a top-notch facility using high-quality materials. And making that call is not as easy as assuming your laptop manufacturer's battery will be of better quality than a battery from a third-party vendor. But you can stick to a couple of key guidelines.

1. Don't skimp on your battery. If you choose the lowest-cost battery you'll probably get a battery that degrades quickly, and you'll end up buying a replacement too soon anyway. So spend the money now to save expense and frustration down the road.
2. Don't buy an expired battery. A good indicator of a battery's performance is how far into its product life it is, whether it's used or new. If possible, look at the bottom of the battery and find the manufacture date.

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Visit Power Options

Get familiar with power management through the ‘Power Options’ applet in the Control Panel. Both XP and Vista come with advanced power management features which shut off components like the monitor and/or the hard drive after specified intervals. This again depends on the chosen ‘Power Schemes’ (for XP) in the same applet. For instance in XP, ‘Max Battery’ under Power Schemes can be selected for maximum battery optimization.

ReCharge. Who wouldn’t love a totally cordless world? As batteries and tool engineering improve, so do the chargers that gas up the battery cells. Makita and Panasonic chargers are especially advanced. They have a light signaling everything: battery too hot, charging complete, trickle charging, even a dead battery light. Both companies offer the following tips for optimizing the charge and caring for your charger:

* Charge the battery at between 50 and 104 degrees F, when possible.

* Charge the battery before completely discharged. A complete run down can cause cell polarity reversal, which kills your batteries completely.

* Charging a battery where it’s cool decreases charge time. If a charger location is too hot, the laptop battery charger senses a hot battery and limits or cuts off current.