Asus Laptop Battery Health – Using the Windows Battery Report Before Replacing Your Battery

Owners of Asus laptops – from VivoBook and ZenBook to TUF Gaming, ROG Strix, ProArt StudioBook
and ExpertBook – rely on stable battery performance for study, work and gaming on the move. As the internal
lithium-ion battery ages, capacity gradually declines. Before you decide to replace the battery, it is useful
to evaluate its actual condition using the Windows battery report.

Windows provides an integrated diagnostic command, powercfg /batteryreport, that reads information
from the Asus battery controller and writes it into an HTML report. This guide explains how to generate that
report, how to interpret the key values and how to use them as a professional basis for choosing a replacement
Asus battery.

Browse compatible Asus laptop batteries

1. Why battery health matters on Asus laptops

Asus offers a broad range of mobile systems: thin-and-light ZenBook models, mainstream VivoBook devices,
business-focused ExpertBook series and high-performance TUF and ROG gaming laptops. Across all these platforms,
battery condition has a direct impact on:

• Available runtime away from the AC adapter.
• System stability under CPU and GPU load when running on battery.
• The ability to work through meetings, lectures or flights without interruption.
• Thermal behaviour and overall user experience in battery-saving modes.

Typical signs of aging include rapidly declining runtime, percentage readings that drop suddenly, and
unexpected power loss during gaming or heavy workloads. The Windows battery report helps quantify these
observations by comparing the original design capacity with the current full charge capacity of the Asus battery.

2. Starting an elevated command environment in Windows

All battery report commands must be executed with administrator rights. The procedure is identical for Asus
laptops running Windows 10 or Windows 11:

1. Press the Windows key and type cmd.
2. Right-click on Command Prompt and select Run as administrator.
3. Confirm the User Account Control prompt if it appears.
4. An elevated command window opens. This is where you enter the commands described below.

Alternatively, you can use PowerShell or Windows Terminal as long as the
session is started with administrator privileges.

3. Key powercfg /batteryreport commands for Asus laptops

The command powercfg /batteryreport collects information about the Asus battery, recent usage and
charging behaviour, then creates an HTML report. The following ready-to-copy commands cover the most common
storage locations for the report.

3.1 Save the Asus battery report on the Desktop

This is a practical default for individual users.

powercfg /batteryreport /output "%USERPROFILE%\Desktop\battery-report.html"

After execution, a file named battery-report.html will appear on the Windows Desktop of your Asus
laptop.

3.2 Save the battery report in the Documents folder

To keep the Desktop clean while still having easy access to diagnostics, use the Documents folder instead.

powercfg /batteryreport /output "%USERPROFILE%\Documents\battery-report.html"

3.3 Use a dedicated diagnostics folder

Technicians and power users who regularly analyse multiple Asus systems often prefer a dedicated folder on a local
drive for diagnostics.

powercfg /batteryreport /output "D:\PowerReports\asus-battery-report.html"

The folder path can be adapted to your environment; ensure the target directory exists before executing the
command.

3.4 File names that identify Asus model families

Including the Asus series or model in the file name allows you to store and track multiple reports on the same
analysis workstation. Examples include:

powercfg /batteryreport /output "%USERPROFILE%\Desktop\asus-zenbook-ux425-battery-report.html"
powercfg /batteryreport /output "%USERPROFILE%\Desktop\asus-vivobook-15-battery-report.html"
powercfg /batteryreport /output "%USERPROFILE%\Desktop\asus-tuf-gaming-f15-battery-report.html"
powercfg /batteryreport /output "%USERPROFILE%\Desktop\asus-rog-strix-g15-battery-report.html"

4. Additional Windows power diagnostics relevant to Asus systems

In addition to the battery report, Windows includes further diagnostics that can be helpful when dealing with
power drain, sleep issues or performance anomalies on Asus laptops.

4.1 Energy efficiency analysis

The energy report analyses current power settings, device drivers and wake sources, helping you identify
misconfigurations that may prevent your Asus system from entering low-power states.

powercfg /energy /output "%USERPROFILE%\Desktop\energy-report.html"

4.2 Sleep study for Modern Standby-capable Asus models

Many recent ZenBook, VivoBook and certain ROG/Flow devices support Modern Standby. The sleep study report shows
how much battery each component or application consumes while the device appears to be “asleep”.

powercfg /sleepstudy /output "%USERPROFILE%\Desktop\sleepstudy-report.html"

5. Interpreting the battery report for an Asus laptop

After generating battery-report.html, open the file in your browser. The section
Installed batteries summarises the characteristics and state of the battery used in your Asus
laptop.

• Manufacturer entry – this may show “ASUSTeK”, “ASUS” or the underlying cell manufacturer.
• DESIGN CAPACITY – the nominal capacity when the battery pack was new.
• FULL CHARGE CAPACITY – the maximum charge the battery can hold today.
• CYCLE COUNT – where available, an indication of how many full charge cycles the pack has
  completed.

Comparing full charge capacity to design capacity provides a practical estimate of remaining battery health:

• 80–100% of design capacity: the Asus battery is in good condition.
• 60–79% of design capacity: moderate wear; runtime is reduced compared to original
  performance.
• Below 60% of design capacity: significant wear; a replacement battery is typically
  recommended.

For example, an Asus TUF Gaming laptop originally equipped with a 90 Wh battery that now reports a full
charge capacity of 50 Wh has lost a substantial portion of its original capacity. If the system also shows
rapid discharge and instability under GPU load, this strongly indicates that the pack is nearing the end of its
practical service life.

6. Interaction with Asus software and firmware tools

Many Asus laptops include vendor-specific tools that complement the Windows battery report:

• MyASUS – often provides battery health information and battery care modes that limit
  maximum charge to extend service life.
• Armoury Crate on gaming models – manages performance and power profiles that affect how
  the battery is used under load.
• UEFI firmware diagnostics – accessible by pressing the appropriate key at startup, sometimes including
  hardware checks for battery and power.

Using these Asus tools alongside powercfg /batteryreport gives a more complete view. If both the
Windows report and Asus utilities show pronounced capacity loss or recommend service, planning a battery
replacement is a reasonable step.

7. When to plan a battery replacement on an Asus laptop

Deciding when to replace an Asus laptop battery is a combination of measured data and practical requirements:

• Full charge capacity has dropped significantly below design capacity.
• Battery runtime is no longer sufficient for your typical sessions away from mains power.
• The system experiences unexpected shutdowns under load when on battery power.
• Asus utilities indicate that the battery condition is poor or recommend replacement.

For content creators, developers and gamers using Asus devices, a degraded battery can also restrict sustained
performance when unplugged, as the system may throttle earlier to protect the pack. A new, high-quality
replacement battery restores the intended balance between mobility and performance.

8. Selecting the correct replacement Asus battery

When sourcing a replacement battery for an Asus laptop, precise matching is important. Consider the following
parameters:

• Exact Asus model, such as Asus VivoBook 15, Asus ZenBook UX425,
  Asus TUF Gaming F15, Asus ROG Strix G15, Asus ROG Flow X13 or
  Asus ExpertBook B-series.
• Battery part number printed on the original pack, for example codes in the style of
  C21Nxxxx, C31Nxxxx, C41Nxxxx, A32Nxxxx and similar references.
• Voltage (V) of the original battery, which must match the specification of the replacement.
• Capacity (Wh or mAh); a replacement with the same or slightly higher capacity is typically
  acceptable if designed for the same chassis.

Professional product listings for Asus batteries normally include a list of compatible laptop models and
corresponding part numbers. Providing the exact model name and a clear photo of the original battery label
allows compatibility to be verified before purchase.

View replacement batteries for Asus laptops

Incorporating the Windows battery report into your standard diagnostic routine on Asus laptops provides clear,
quantifiable evidence of battery wear and supports accurate, well-timed replacement decisions for both
individual users and organisations.