Precision 7540 and 7740: Battery Drains When Running Heavy Loading Applications With Adapter Connected

Summary: This article is about battery on Precision 7540 and 7740 draining charge when using heavy loading applications even when connected to power adapter.

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Symptoms

You may find your Dell Precision 7540/7740 battery discharging while plugged in when you run graphics and processor-intensive applications such as 3D games, photo or video editing tools, etc.

Cause

Hybrid Power Feature

Dell Precision 7540 and 7740 laptops are designed to support Hybrid Power Mode which takes the advantage of using for a smaller and lighter weight adapter. When the system's total power requirement is more than the capacity of AC adapter, the system will start consuming the battery power without sacrificing the performance. This feature is enabled as long as the battery capacity is above 10%.

With this design, you may encounter the following events when the system is running certain applications such as 3D games, video processing app, etc..., which may put both discrete graphics and processor in heavy loading status.

  • Battery charge does not increase when connected to the power adapter.
  • Battery charges slowly when connected to the power adapter.
  • Battery charge depletes when connected to the power adapter.
 
Note: Hybrid Power feature cannot be disabled.

Resolution

Working as designed

This is working as the system was designed.

Ensure the AC Adapter in use is rated to provide the required power to the system. Refer to Setup and Specification Guide for power adapter specification for your Dell Precision model.

Affected Products

Precision 7540, Precision 7740
Article Properties
Article Number: 000134944
Article Type: Solution
Last Modified: 30 Apr 2026
Version:  8
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