As laptops have become more advanced so the need for increased power consumption and longevity has increased for mobile system users. On many occasions, it can come down to mobility over performance and battery life. This article provides information on how to improve your laptop battery's performance and lifespan. The article also expands to give some helpful tips and information on how to diagnose and test your battery health and performance.
Dell laptops come with one of two kinds of batteries:
A swappable battery is made of lithium-ion cells and you can easily remove and replace it with a fully charged spare battery when you run out of power. This battery is a great option for those who need to stay up and running no matter where you are.
A built-in battery is usually made of lithium-ion polymer and is designed to fit the non-traditional shapes of thin and light laptops, such as the XPS and Inspiron 7000 series. These batteries are not easily removable and will need trained technicians to replace it. This battery is a great option if you want to pack light.
Is how long your battery will last between charges. Battery life is based on a battery's capacity or the number of cells or watt-hours (Wh) of a battery. The general rule is that the more cells or the higher the watt-hours powering the same laptop under the same operating conditions, the longer the battery will last when unplugged from an outlet.
|Battery Capacity||Battery Life||Choose if you want|
|Large (9 cell)||90 Wh||Longer battery life and longer battery pack lifecycle.|
|Standard (6 cell)||48-60 Wh||Lighter weight|
Battery Pack Lifecycle:
Is how often a battery can be recharged before its charge capacity starts to degrade (for example, when a fully charged battery is reduced to 60 percent of the original battery charge capacity). This reduction of charge capacity, in turn, leads to a significantly reduced battery life. Reduced charge capacity is normal on all rechargeable batteries.
A lower capacity battery will wear out faster than a higher capacity battery because you have to charge it more often. Typically, you'll notice reduced battery life after 18-24 months. If you're a power user, you may notice reduced battery life sooner than 18 months.
Large capacity batteries are great for extra battery life, but more cells and higher watt-hours also mean that the battery size and weight will increase.
When buying a replacement battery, make sure that you consider whether longer battery life or lighter weight best fits your mobile style.
The easiest way to get the best battery life out of your Dell laptop is to select one of the pre-configured power plans. The pre-configured power plans automatically adjust key settings that can have a significant impact on battery life, such as reducing screen brightness or dimming the display when you are not actively using your laptop.
To extend battery life as long as possible during a working session
Windows 10 has a built-in 'Battery Saver' mode that can be activated to extend your system's battery life. The Battery Saver mode will monitor and limit background activity and other features such as push notifications. You do have the option to enable or disable this mode within settings or within advanced Battery Saver settings, you can customize the mode to best suit your needs.
How to turn on Battery Saver mode
Figure 1: Click on the Action Center icon within the taskbar and select the tile for Battery Saver.
Figure 2: If running Cortana then type Battery Saver into the search box and select from the results.
Within the Battery Saver settings page, you will be able to turn on and off the feature and customize the feature to best meet your needs.
Figure 3: Turn Battery Saver On or Off
Figure 4: Additional settings available via the Battery use and Battery saver settings links
Within the Battery use settings, you will be able to view battery use across multiple applications over a selected period. You can also change settings for background applications that may be using up battery power.
Figure 5: Battery use shows further info on apps and their power usage.
Figure 6: Battery Saver Settings screen allows you to customize further Battery Saver feature.
Battery Saver Settings provides further customization of the feature:
Leaving your laptop plugged in all the time or never allowing your battery to fully charge when it's plugged in can reduce your battery's charge capacity and shorten its lifecycle. However, Dell has introduced two new battery charge settings, Dell Desktop Mode and Dell Longevity Mode, that help extend a laptop's battery pack lifecycle.
Desktop Mode monitors the charge status of the laptop battery, and if it spends most of the time at 100 percent charge while connected to the power adapter, Desktop Mode will automatically adjust the charge levels of the battery. The adjustments include regularly allowing the battery to discharge or drain, even while plugged in. The benefits help slow the reduction of charge capacity over time and may even decrease the need to purchase a replacement battery during the life of your laptop.
To turn on Desktop Mode in Microsoft Windows
Longevity Mode monitors the charging and discharging behavior of your battery. If you're frequently connecting and disconnecting your laptop to a power source without allowing the battery to charge fully, Longevity Mode will moderate the extent to which your battery charges to protect your laptop battery health.
To turn on Longevity Mode in Microsoft Windows
Watch this video to learn how to update the BIOS
Update system setup (BIOS) - English Only (1:46)
Right-click on the Start Menu to bring up the menu.
Select Command Prompt (Admin) from the menu.
Figure 1: Windows 10 command prompt (admin) selection
Type in powercfg /batteryreport /output "C:\battery_report.html" into the command prompt window that appears.
Figure 2: Screenshot of the Command Prompt (admin) with the command line required.
Navigate to the C: root folder either through My Computer or through Explorer. You should see a file called battery_report (HTML File) listed.
Figure 3: Screenshot of the location of the output file battery_health.
The report will be separated into sections:
The first section will provide information on your system including the BIOS revision, system name and Windows build.
Figure 4: Page 1 of the battery health report.
The second will show information on the batteries that are installed within your system.
Figure 5: Page 2 of the battery health report.
The third part lists information on the recent usage of the battery state and remaining capacity.
Figure 6: Page 3 of the battery health report.
Figure 7: Usage History
Figure 8: Battery Capacity History
The report will only provide information on the battery and will not advise you on replacing it. It is a good tool to check what the capacity was previously running at and it's current state when at full charge.
Figure 9: Battery Life estimates
For Computers with Windows 7 and Windows 8
For computers with Windows 7 and Windows 8 (you will have to go to the desktop in Widows 8), right-click the battery icon in the lower right-hand corner, click Dell Extended Battery Life Options, if that is not an option proceed to Step iv.
Click the Battery Health tab.
Make note of the message on the page, if anything other than "Your battery is performing normally", the battery should be replaced.
Check the Battery Health in the BIOS, for more information refers to the Check the Battery Health in the BIOS section. Make note of the message on the BIOS screen under General or the Advanced tab, when the battery shows as "Normal" or "This battery is performing normally", then the battery is performing as it should.
Dell notebooks also include a built-in diagnostics application, called ePSA. For information on how to access the ePSA application, refer to Dell Knowledgebase article, Resolve Hardware Issues Using ePSA or PSA Diagnostics and Guide to Error Codes. Once in the ePSA application select the battery diagnostics.
If you find that your newly purchased laptop battery shows a significant drop in capacity via testing APP, you can recover that by performing several charging and discharging cycles.
Detailed steps described below:
The more times the above steps are performed the greater chance the battery capacity % will recover.
When you see a decrease in capacity, in the best-case scenario, you can reduce the loss to 0.9%.
Article ID: SLN85590
Last Date Modified: 09/09/2019 04:59 AM
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