2020 Dell XPS 17 9700 facing worrying charging issues, drops from 100 percent to 65 percent battery while plugged in - Notebookcheck.net

We've updated our original article below to reflect the new info as this battery discharge behavior is not a bug but an intentional design choice. The steady discharge rate when running high processing loads is an unfortunate compromise for the high-power CPU and GPU involved.).

(July 10, 2020 2:00 PM update: Dell have clarified with us that they will be investigating the 130 W AC adapter power supply. The adapter should be able to provide 130 W of power to the laptop instead of the ~105 W maximum that we are recording. Thus, while the slow battery discharge rate may be normal when running demanding loads, it may be faster than what Dell was initially anticipating. We will continue to update this page as appropriate.).

In this case, the 17.3-inch laptop appears to be having battery recharge drawbacks when under high processing loads like gaming.

When we closed the game, the recharge rate would jump back to normal.

The official specification for power-over-Thunderbolt 3 is up to 100 W, but Dell’s unique implementation for the XPS 15 and XPS 17 series is set to 130 W instead since these are high-power laptops running on demanding Core H-series CPUs and GeForce GTX/RTX graphics.

It’s safe to assume that this difference is responsible for the slow battery drain when running the game.

(July 10, 2020 update: The Precision 5750 series, which is based on the same XPS 17 chassis, will also exhibit the same battery drain disadvantage when under demanding loads. This will probably be a greater annoyance to Precision users who are more likely to run high loads for longer periods than XPS 17 owners.).

The bright side is that this likely won't impact most XPS 17 owners since you would have to be running extreme loads for about 6 hours straight to fully discharge the battery â â€” an unlikely scenario