Laptop battery life test

Batteries often wear out the fastest of all laptop components. So the sooner you can detect signs of wear and tear, the better your chance of extending your computers battery life. Thats why its important to learn how to check the health of the battery yourself.

Does that sound too technical for an average user like yourself? Dont worry. Well guide you on how to complete this battery check-up the easy way.

How do you evaluate your computers battery life?

Deep within Windows and Mac OS, there are hidden features helping you see how your notebooks battery is doing. These technical reports are crucial in assessing your batterys overall health. But you need to understand some jargon or concepts before you can interpret the battery reports.

Generating Battery Reports on Windows 7 and Higher

On Windows, you can get an easy-to-understand report about your battery with a single command. Heres how:

  • Open the Command Prompt window. Press Windows key + X (or right click on the Start Menu) and click the Command Prompt option.
  • In Command Prompt, type the following command: powercfg /batteryreport and press Enter.
  • The battery report will then be saved to the user accounts directory. Using Windows Explorer, head to your user directory to find and open the file.

The battery report is a simple HTML file and you typically see a variety of sections on it. The first one tells you the laptops basic specifications and the succeeding section shows you details about your installed batteries. In most cases, though, this part of the report will provide information for just one batterythe one youre using.

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The next section is the most important. Pay special attention to the figures under Design Capacity, Full Charge Capacity, and Cycle Count numbers. Design Capacity indicates the amount of power the battery theoretically holds. Full Charge Capacity means the total amount of power the battery actually manages to hold. Naturally, the stats underFull Charge Capacity will be lower than Design Capacity as a result of normal wear and tear on the battery. However, the difference shouldnt be that great. If it is, you should be alarmed.

In addition, theres the Cycle Count number. It shows how many charge cycles the battery has gone through from the time it has been initially used. Keep in mind that a laptop computers battery can only handle so many charge cycles. 500 seems to be the magic number when it comes to charge cycle counts, which may roughly be equivalent to two to three years worth of heavy usage.

Other sections of the report that will further help with diagnosing the state of your battery are the following:

  • Battery usage shows a graph of how your battery drained in the last three days of use.
  • Battery capacity history shows a comparison of full charge capacity and design capacity. The former may be commonly lower than the latter in most reports.
  • Recent usage displays your devices power states in the last 3 days, including how much the battery capacity has drained over time.
  • Usage history exhibits how much time your laptop has relied on battery power and how long it has spent plugged to a power source.
  • Battery life estimates shows an estimate of the equipments average battery life based on how you actually used it.
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Checking the Battery Health of a Mac Computer

For Mac users, evaluating the health of their battery is a much more straightforward process. Simply hold down Option and then click on the battery icon found on the menu bar. Pay attention to the Condition detail on the dropdown menu, which will display any of these battery conditions:

  • Normal means the battery is working alright.
  • Replace Soon means while your battery may be working just fine, it may hold less charge than before.
  • Replace Now means that the battery is performing normally but it holds significantly less charge than ever before.
  • Service Battery means that the battery is no longer working like its supposed to.You should bring it in to an Apple Store to get it checked.

If youre curious to know how far your MacBook hasgone into its battery cycle count and its implication on your Macs built-in power source, check out Apples support document on battery life.

Can I restore life into my dying battery?

Of course, the logical next step is to replace your laptops battery. If youre not ready to shell out $100+ for replacements, though, you could try a few last-ditch attempts at restoring life into your ailing power storage.

Recalibrate the Battery

When your computers OS cant figure out how much power your battery can hold, it probably needs recalibration. This happens when the netbook is constantly tethered to the mains or it never had to die all the way.

Although many laptop manufacturers nowadays provide calibration tools for certain notebook models, you can always do it manually. Simply follow these procedures:

  1. Fully charge your battery and leave it plugged for about 2 hours to cool it down.
  2. Disconnect the portable computer from the power source and let the battery drain fully. The best way to do this is to leave the computer on until it either shuts down or sleeps/hibernates.
  3. Keep the device turned off for the next 3 to 5 hours.
  4. Turn it on and charge the unit all the way to 100%.
  5. Youre done!
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Trick the Charge Cycle

A charge cycle is counted whenever a full battery drains all the way down and then recharged to its maximum capacity. To keep your lithium ion (Li-ion) battery from exhausting its maximum amount of charge cycles, trick it into counting fewer cycle counts per charge. Do this by plugging your netbook as soon as it drops around 35% to 45% levels and letting it charge only up to 75% or 85% every time. This way, you wont use up as many charge and recharge cycles and effectively expand the lifetime of your unit.

Keep Your Laptop Cool and Comfy

If your laptop gets really hot when youre using it, you run the risk of damaging your battery. A damaged battery typically drains faster than normal, which could effectively shorten its life. Dont let this happen to your battery by getting a reliable cooling pad for your notebook. When you do, youll be surprised at how a cooler battery loses charge slower.

Caring for your laptop computers battery life is an indispensable part of maintaining the equipment itself. Good thing that its fairly easy to evaluate and preserve its health.

To better care for your batteries, be careful not to fall victim to 7 myths about laptop batteries. Such dangerous misconceptions could be in the way of you properly maintaining your notebook, after all.

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