ASUS ROG Zephyrus M16 GU604 Battery Not Charging Past 80% Fix
ASUS ROG Zephyrus M16 GU604 · Core Ultra 9 185H · Windows 11 · Battery care
Check Battery Care Plus in MyASUS
Open MyASUS → Customization → Battery Care Plus. The 80% charge limit is an intentional ASUS feature called Battery Health Charging. It has three modes: Maximum Life (80% cap), Balanced (90% cap), and Maximum Performance (100%). Change to Maximum Performance to allow charging to 100%.
Update the MyASUS app
Open the Microsoft Store, search for MyASUS, and install any available updates. An outdated MyASUS app may not correctly sync battery charge limit settings with the BIOS, causing the 80% cap to persist even after it is disabled in the Battery Care Plus interface.
Check BIOS battery settings
Restart, press F2/Delete to enter BIOS. Look for Battery Health Charging or Battery Charge Limit under Advanced or Power settings. If a charge limit is set here, change it to Disabled or increase the threshold to 100%. BIOS settings take precedence over MyASUS software settings.
Reinstall MyASUS to reset battery settings
Uninstall MyASUS from Control Panel, restart, then reinstall it from the Microsoft Store. Corrupted MyASUS configuration files can cause the battery care setting to stick at 80% even after being changed. A fresh install resets the configuration to default (Maximum Performance, 100% charge).
Update the BIOS
Go to ASUS Support and install the latest BIOS for the ROG Zephyrus M16 GU604. BIOS updates may include fixes for battery charge controller communication that improve the accuracy of charge threshold enforcement and allow higher charge limits to be applied correctly.
Check if this is intentional battery health behavior
If you intentionally want to limit charging to 80% to prolong battery life for long-term use (kept plugged in most of the time), the Battery Care Plus setting is working as designed. The 80% limit reduces battery cycle stress significantly over months of continuous charging and extends the battery lifespan.
Hisham, Kuala Lumpur: “My ROG Zephyrus M16 GU604 stopped charging above 80% and I thought it was a hardware fault. Found the Battery Care Plus setting in MyASUS was set to Maximum Life mode. Switching to Maximum Performance fixed it immediately.”
Frequently Asked Questions
Should I keep Battery Care Plus enabled on the ROG Zephyrus M16 GU604?
If the laptop is plugged in most of the day, keeping Battery Care Plus at Maximum Life (80%) significantly reduces battery degradation over time. If you frequently need full battery capacity for portable use, switch to Maximum Performance (100%) or Balanced (90%). Use Maximum Life for desk use and Maximum Performance before travel.
What battery capacity does the ASUS ROG Zephyrus M16 GU604 have?
The Zephyrus M16 GU604 has a 90Wh battery. At the 80% Battery Care Plus limit, the effective usable capacity is approximately 72Wh. At Maximum Performance (100%), the full 90Wh is available. Real-world battery life varies based on display brightness, performance mode, and workload.
Does the 80% charge limit damage the battery of the Zephyrus M16?
No. The opposite is true. Limiting charge to 80% reduces the electrochemical stress on the lithium battery cells during charging, which slows capacity degradation over many charge cycles. This is a best practice for laptops that remain plugged in for extended periods.
Can I set a custom charge limit other than 80% or 100% on the Zephyrus M16?
MyASUS offers preset thresholds of 80%, 90%, and 100% through the Battery Care Plus modes. Custom percentage thresholds are not natively supported in MyASUS. For more granular control, third-party battery management tools may offer custom limits, but compatibility with ASUS hardware is not guaranteed.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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