ASUS · VivoBook 15 X1504 · i5-1235U
Battery Draining Fast Fix
Battery draining fast on the ASUS VivoBook 15 X1504 i5-1235U means the laptop loses charge significantly faster than expected, lasts only 2 to 4 hours instead of the rated 7 to 9 hours, or the battery percentage drops rapidly even during light tasks. The VivoBook 15 X1504 uses a 3-cell 42Whr battery with an Intel Iris Xe integrated GPU. Fast drain is usually caused by background processes, display brightness, or incorrect power plan settings.
Fix 1: Switch Power Plan to Balanced
Open Settings → System → Power & battery. Set Power mode to Balanced. Also open Control Panel → Power Options and confirm the plan is Balanced, not High performance. High performance disables CPU throttling and keeps the i5-1235U cores at full frequency even for idle tasks, draining the 42Whr battery significantly faster than Balanced mode which allows the E-cores to handle light tasks at reduced frequency and voltage.
Fix 2: Enable Battery Saver for Extended Runtime
Open Settings → System → Power & battery → Battery saver. Set it to turn on automatically at 20% or turn it on manually. Battery Saver reduces background app activity, limits push notifications, reduces display brightness, and caps CPU usage. Combined on the i5-1235U VivoBook 15, Battery Saver can extend runtime by up to 30% for light productivity tasks compared to Balanced mode without Battery Saver.
Fix 3: Check Background App Battery Usage
Open Settings → System → Power & battery → Battery usage. Review which apps are using the most battery in the last 24 hours. Common high-drain background apps include Microsoft Teams, Google Chrome with many tabs, OneDrive sync, and Windows Defender when running a scheduled scan. Close or restrict background activity for these apps. In Settings → Apps → Installed apps, find Chrome and Teams and set their background app permissions to Power optimized to reduce their battery impact when running in the background.
Fix 4: Update Intel Power Management Driver
Download the Intel Dynamic Platform and Thermal Framework driver for the ASUS VivoBook 15 X1504 from ASUS Support. Intel DPTF manages thermal and power budgets on the i5-1235U platform. An outdated DPTF driver may not correctly implement the E-core power gating that allows the i5-1235U to operate efficiently on battery. Without correct DPTF, the P-cores remain active for tasks that E-cores should handle, consuming more power than the balanced operating mode is designed to use.
Per Suraya Nordin, teacher using ASUS VivoBook 15 X1504 for lesson preparation: “Battery was draining in 3 hours on the VivoBook 15. Switching from High Performance to Balanced power plan and closing Chrome tabs I was not using extended battery life to over 7 hours. The power plan change alone made the biggest difference.”
Frequently Asked Questions
Why is the ASUS VivoBook 15 X1504 battery draining so fast?
High Performance power plan, maximum brightness, background apps, or Windows Defender scan are consuming excess battery. Switch to Balanced power plan, reduce screen brightness to 50 percent, close background Chrome tabs and Microsoft Teams, and check Battery usage in Settings for high-drain apps.
How long should the ASUS VivoBook 15 X1504 battery last?
ASUS rates the VivoBook 15 X1504 at up to 9.7 hours. Real-world battery life in typical use is 6 to 8 hours with screen at 50 percent brightness and Balanced power plan. Maximum runtime with Battery Saver enabled and minimal background activity is approximately 8 to 9 hours on a new battery.
Does ASUS VivoBook 15 X1504 have battery health mode?
Yes. Open MyASUS → Power → Battery Health Charging. Set the maximum charge to 80 percent for maximum battery lifespan mode. This limits the battery to 80 percent capacity per charge to reduce long-term battery degradation from full charge cycles. For maximum runtime per charge, disable the 80 percent limit and allow full charging to 100 percent.
Can a Windows Update cause faster battery drain on VivoBook 15 X1504?
Yes. Some Windows updates temporarily trigger Windows Defender to run a full system scan after installation, which consumes significant CPU and battery for up to an hour after the update. Abnormally fast drain immediately after a Windows update is usually resolved within 1 to 2 hours as background indexing and scanning complete. If fast drain persists after 2 hours post-update, check Battery usage in Settings to identify persistent background processes.
Conclusion
Battery draining fast on the ASUS VivoBook 15 X1504 i5-1235U is fixed by switching to Balanced power plan, reducing screen brightness, closing background apps, and enabling Battery Saver for extended runtime. Check Battery usage in Settings for high-drain apps and restrict their background activity. Update the Intel DPTF driver from ASUS Support for correct i5-1235U P-core and E-core power budgeting. ASUS Battery Health Charging at 80 percent extends long-term battery lifespan for users who primarily use the laptop while plugged in.
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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