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How to choose and change the battery of my Asus laptop?

The battery of your laptop is undoubtedly one of the most important elements of your computer, just like the screen, it is certainly one of the most essential.

Whether your laptop is your most faithful travel companion, your most reliable partner for your professional projects or your go to leisure device, a simple battery failure will eliminate all of its autonomy and limit you.

There are several reasons for a failing battery, from misuse to overheating or simply an aging battery. The average life span of a laptop battery is 18 to 24 months.

Or maybe you are looking to upgrade to a battery that will provide you with greater autonomy

The Asus Accessories team wants to share with you some simple methods to confirm that your laptop battery is indeed failing and the steps to follow when ordering a new one.

Contents of this article:

How to recognize battery failure?

batterie faible pc

Let's start at first with the symptoms and causes of this unexpected and unfortunate failure.

• Your battery is no longer charging and requires you to remain plugged into an AC outlet?
• You no longer have any autonomy?
• Your battery is fully charged but its battery life is getting shorter?
• Does your battery heat up or become hot?
• It is no longer recognized by the computer?
• No longer charges or stops charging at a certain level? Or once recharged to 100% and it suddenly drops to 0%?
• The battery prevents the computer from starting?

The most common causes of battery failure are:

You have left your battery on continuously, it has been connected to the power outlet too long while in use or when fully charged, which has caused overheating or a short circuit. It is also possible that you have discharged the battery to a minimum and that it can no longer recharge or that you have exposed it to the sun, which is strongly discouraged.

Remember that the operating instructions and start-up advice prevents most cases of battery failure..

How to test your battery?

If you suspect the issue with your device is coming from your battery, there are easy and handy ways to test the battery and confirm your suspicions.

Your PC turns on But the Autonomy Is Low

Before performing any diagnostics, when Windows detects a damaged battery, it will inform you directly of its condition and notify you that it needs to be changed.

However, if Windows does not give you an error message but you have lost autonomy, you can check the actual capacity of your battery by downloading HWInfo 64 which will give you the theoretical capacity of your battery as well as the current capacity.

After downloading and opening the ZIP file, you have to click on "HWiNFO64.exe". If a Windows prompt asks if you allow HWiNFO64.exe to run, click "Allow"
Then select "Sensors-only" check box and click on "RUN". Allow a few moments for HWiNFO load.


Once HWiNFO64 is open, it will show you all of the available information about your computer including information regarding your battery.

batterie hwinfo64

In our example, the initial capacity of the battery, when new, was 62Wh. HWiNFO indicates a capacity of 38.56Wh at 100% charge.

Our battery is therefore at ( 38.56 / 62 * 100 = ) 62.6% of its initial capacity. Since, the battery has lost (100 - 62.6 = ) 37.4% of its capacity, it will need to be charged more often.

Depending on the model of your laptop, HWiNFO will show you directly the result of this calculation and tell you the "Wear Level", in this example 37.4%, indicating that the battery lost 37.4% of its original capacity. Simply, if originally our battery gave us 3 hours of autonomy per full charge, it would now allow only 1hour and 52 minutes.

Your Laptop Does Not Turn On

If your laptop does not start after you have completely drained the battery, it may have caused a short circuit in the motherboard.
To verify that the problem is your battery, just remove the battery and try to start the laptop with just the power chord. If it restarts without a battery (plugged into the AC outlet), then the battery is out of order.

How to remove the battery and identify its references/specifications?

You will need to perform a simple and easy disassembly of your laptop. You will need to recognize the battery, its capacity and specificities to replace it with the same battery or one that is 100% compatible with your laptop.

There are different ways of accessing the battery depending on the type of laptop you have:

Laptops with a Removable Battery

These are becoming less common since newer laptops tend to be more compact but if your laptop has a removable battery, follow this simple procedure to remove the battery:

• Disconnect your PC from any AC outlet and turn it off.
• Turn your computer over and find the latches that hold the battery
• Open the latches and remove the battery

Laptops Without a Removable Battery

Since the latest generations of laptops are very compact, the batteries are often directly attached to the chassis and not easily accessible. Here is a common procedure to access the battery for this type of laptop:

• Disconnect your PC from any AC outlet and turn it off.
• Turn your computer over and remove the various screws present (on the bottom case).
• Using a standard screwdriver or a card, gently wedge open the space separating the bottom case of the laptop from the keyboard.
• Beware; when you attempt to separate the keyboard from the bottom case, a cable connects the two. You will need to delicately disconnect one of its connectors before separating.
• The battery is usually located under the keyboard, along your screen and is also connected by a cable.
• Unplug the cable, remove the old battery, replace it with the new one and then carefully repeat the steps in reverse to reassemble the computer.

A lot of information is printed directly on the battery as to its type, model, capacity and voltage.

batterie asus

Today the majority of batteries in consumer electronics are lithium polymer (Li-Po) or lithium- ion (Li-Ion).

In addition to the type battery, there are three things to note:

• The voltage (in Volts or V): The nominal voltage of the battery which is the number of Volts that your laptop requires to function must be the same in the new battery.
• The capacity (in milliampere-hour or mAh): represents the autonomy of your laptop, the higher the mAh of the battery the longer your battery will stay charged (higher autonomy).
• The power (in watt-hours or Wh): Wh is the product of the two previous values (mAh X Volts), it indicates the power of the battery. You can use a battery with more power (Wh) than the original one as long as it has the same voltage rating and is compatible with your laptop.

As for the capacity of the battery, if a high capacity battery exists that fits your model, nothing prevents you from using it to increase your autonomy.

Warning, increasing power capacity (mAh) too much is not recommended. Your charger may not be able to recharge it, or it just may take a very long time (ex.10 hours instead of 2).

How to choose a new battery?

modèles de batteries asus

A very wide selection of batteries is available, both in stores and online, it is important to know how to choose your battery while keeping in mind the information outlined above.

Avoid cheap discount batteries sold on the internet, they are very often assembled with poor quality components that will not last and may damage your laptop.

You can also easily find a new battery by selecting the model of your Laptop on the following page:

How to maintain the battery of your Asus device?

First use: When using your new battery for the first time, it is advisable to carry out 3 complete charging cycles - charge (100%) / discharge (20%) - in order to prime the battery.

The Asus Accessories team suggests the following guide to maintain the capacity and conserve the life of your battery:

• DO NOT let the battery drain to 0%: A belief dating back to the first nickel based cell phone batteries suggested that you should fully drain the battery before recharging. Today’s Lithium-ion batteries fare better when they're charged. If you constantly let it drain to 0%, it becomes unstable and this will seriously degrade the lithium batteries of laptops. It is important to keep at least 20% of the charge to avoid irreversibly damaging the battery.
• Do not keep your battery always fully charged: Just like emptying your battery to 0%, keeping your battery permanently charged at 100% is very harmful. As time goes by, this will increase its internal resistance and reduce its capacity. It is advisable to keep your battery between 30% and 40% of its charge capacity for optimal storage.
• Perform regular charging cycles: If you don’t use your Laptop battery very often, it is important to cycle it (discharge => charge) regularly, at least once a month.

What to do with the used battery?

A laptop battery contains lithium elements that are very harmful to the environment, so it is imperative that you dispose of the battery properly so that it is recycled, processed and eventually reused to make a new battery.

batterie recyclage

To do this, simply dispose of it in the used battery collection bins that you will find at your local supermarket.

How to optimize the autonomy of your battery?

The last part of this article is dedicated to helping you maximize the autonomy of your new battery. The pie chart below illustrates the energy consumption of each component of your laptops and the impact on the autonomy of the battery.

As you can see, the screen uses the most energy by far. If you want to improve the autonomy of your laptop, you will need to keep the brightness setting to low.

The remaining components consume less energy. Windows 10 (operating system) does a good job managing the energy consumption of these components . In order to optimize battery life and energy consumption you should activate the Energy Saver.
News added at : March 05, 2019 at 11:51 AM
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