How to Calibrate Your Laptop's Battery For Accurate Battery Life Estimates curate-battery-life-estimates/ So you’re using your laptop and, all of the sudden, it dies. There was no battery warning from Windows,, in fact, you recently checked and Windows said you had 30% battery power left. What’s going on? Even if you treat your laptop’s battery properly, its capacity will decrease over time. Its built-in power meter estimates how much juice available and how much time on battery you have left, but it can sometimes give you incorrect estimates. Why Calibrating the Battery Is Necessary Batteries need to be cared for properly, they’re a critical part of our mobile devices and If you’re taking proper care of your laptop’s battery , you should be allowing it to discharge somewhat before plugging it back in and topping it off. You shouldn’t be allowing your laptop’s battery to die completely or even get extremely low each time you use it. Performing regular top-up will extend your battery’s life. However, this sort of behavior can confuse the laptop’s battery meter. No matter how well you take care of the battery, its capacity will still decrease as a result of unavoidable factors like typical usage, age, and heat. If the battery isn’t allowed to run from 100% down to 0% occasionally, the battery’s power meter won’t know how much juice is actually in the battery. How Often Should You Calibrate the Battery? Manufacturers generally recommend calibrating the battery every 2-3 months. This helps keep your battery readings accurate. In reality, you likely don’t have to do this that often if you’re not too worried about your laptop’s battery readings being completely precise. However, if you don’t calibrate your battery regularly, you may eventually find your laptop suddenly dying on you when you’re using it – without any prior warnings. When this happens, it’s definitely time to calibrate the battery. Basic Calibration Instructions Calibrating – or recalibrating, really, as the battery was calibrated in the past when the battery had more capacity – involves letting the battery run from 100% capacity straight down to almost dead, then charging it back to full. The battery’s power meter will then see how long the battery lasts and get a much more accurate idea of how much capacity the battery has left. Some laptop manufacturers include utilities that will calibrate the battery for you. These tools will usually just make sure your laptop has a full battery, disable power management settings, and allow the battery to run to empty so the battery’s internal circuitry can get an idea of how long the battery lasts. Check your laptop manufacturer’s website for information on using any utilities they provide. You should also look at your laptop’s manual or help files. Each manufacturer may recommend a slightly different calibration procedure or tool to ensure your laptop’s battery is properly calibrated. Some manufacturers may even recommend against doing this. Apple says its newer laptops don’t require this calibration procedure , although older models do. How to Manually Calibrate a Battery While it’s a good idea to use any included utilities or just follow instructions specific to your laptop, you can also perform battery calibration without any specialized tools. The basic process is simple: * 1. Charge your laptop’s battery to ful, that’s 100%. * 2. Let the battery rest for at least two hours, leaving the computer plugged in. This will ensure that the battery is cool and not still hot from the charging process. You’re free to use your computer normally while it’s plugged in. * 3. Go into your computer’s power management settings and set it to automatically sleep or hibernate at 5% battery. (Below are instructions how to reach “powermanagement” for Windows-xp, vista and Windows Seven.” * 4. Pull the power plug and leave your computer discharging until it automatically sleeps or hibernates . You can keep using your computer normally while this happens. (Note: If you want to calibrate the battery while you aren’t using the computer, be sure your computer isn’t set to automatically sleep, hibernate, or turn its display off while idle. If your computer automatically enters power-saving mode while you’re away, it will save power and won’t discharge properly.) 5. Allow your computer to sit for five hours or so after it automatically shuts down. * 6. Plug your computer back into the outlet and charge it back up to 100%. You can keep using your computer normally. * 7. Ensure any power management settings are set to their normal values. For example, you probably want your computer to automatically power off the display and then go to sleep when you’re not using it to save battery power Below are links to two RELATED articles for further reading. HTG Explains: Should You Shut Down, Sleep, or Hibernate Your Laptop? ibernate-your-laptop/ How to Increase Your Windows Laptop’s Battery Life -life/ * Computers can sleep, hibernate, or shut down. Sleep allows you to quickly resume using your laptop. * * Your laptop should now be reporting a more accurate amount of battery life, sparing you any surprise shutdowns and giving you a better idea of how much battery power you have at any given time. The key to calibration is allowing the battery to run from 100% to almost empty and then charging it all the way up to 100% again, which may not happen in normal use. Accessing Power Management 1. Windows-xp A. Press the start button or click on the “start menu. B. If the start is in “classic view”, press the letter s until reaching “settings” followed by hitting enter. If using a mouse, click into “settings. C. Press enter on the default of “control panel, or click on this same option. D. Press the letter p until reaching “power options” and hit enter. Mouse users click on “power options.” e. Pressing control plus tab moves between property sheets and tab will move through the options on each sheet. The spacebar iis used to check or uncheck aa checkbox. It would probably be useful to explore all the property sheets and make any changes you prefer for your personal laptop. f. When finished making changes, tab to “apply” and hit the spacebar or enter. Mouse users, click on “apply when finished. 2. Windows Vista and Seven: a. Press the start button or click into the search edit field on the start menu. B. Type in “power management” without any quotes. C. Arrow to any of the following choices that are now available and hit enter or click your mouse. “change what the power buttons do” “change battery settings” “change what closing the lid does” “change when the computer sleeps” d. When entering of the above options, tab through the choices and make your choices. Remember to always click on apply or hit the spacebar on apply when finished making changes.]]>

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