Has anyone else noticed this?

[Mr.Bill]

A few weeks ago I started using night mode. I haven't been seriously documenting this, but it seems my laptop battery lasts longer since I did that. I'm no electronic genius, but to me it's reasonable to think less power might be being used with the dark background. Any truth to that?

[AllBlue]

1. Maybe

'"Overall, while dark mode works only in particular settings and may be able to save some energy on certain types of displays, it is not a guarantee. It can be one of the ways to draw less power when displaying apps and websites on screens, and only in OLED and AMOLED displays. "

https://dodonut.com/blog/does-dark-mode-save-battery/

[Mr.Bill]

2. Thanks for the response. Very informative.

How can I tell if I have OLED or AMOLED display on my five year old HP laptop?

[AllBlue]

3. Google knows all

A quick search with the model number of your laptop ( on the label on underside )
will take you to an HP specs page that will tell you what they used.

Here's someone asking about theirs :
https://h30434.www3.hp.com/t5/Notebook-Video-Display-and-Touch/How-can-I-check-that-my-laptop-screen-is-in-fact-an-OLED/td-p/5840631