“If in case of travelling to change the resolution of a 4k display to full hd mode, will the battery run longer as on full hd native resolution matrix - up to 19 hours or it will consume the same power and will run up to 9 hours? Thank you!”
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No. Any UHD panel will consume the same power no matter what resolution is set, in normal use. The power difference between HP's two panels has two causes: 1) The UHD (4K) panel is an OLED, while the FHD (1080p) panel is IPS. OLED panels draw a lot more power than IPS when displaying white; OLEDs draw a lot less power than IPS when displaying back. But, look at most websites: white backgrounds. If you religiously customized Windows and your browser to display everything in dark mode (some extensions can force a fake dark mode onto websites), you could mostly negate this power increase. 2) The UHD panel has a much higher PPI, physically. That means smaller pixels (4x as small) + many more pixels (4x as many). Each pixel is surrounded by a black border, i.e., the transistor that powers the pixel. This transistor is black, not transparent, and thus blocks the backlight. Thus, you must significantly increase the backlight strength to overpower the transistor blockage -> higher density displays have many more transistors that take up a proportionally larger part of the screen area. Think of it like a flashlight behind a screen or mesh: a very fine mesh easily blocks light and you'd need a much stronger flashlight to get the same light vs a very coarse mesh. For #2, the literal transistors are still there, no matter what resolution you set in Windows. The physical pixels' transistors are blocking the backlight. You can read more at Anandtech: https://www.anandtech.com/show/7743/the-pixel-density-race-and-its-technical-merits The only difference you'd see is if you 1) you played GPU-intensive games and 2) you set the *game* resolution to 1080p. Then, the game at FHD (1080p) will consume less power vs the game rendering at 4K because the GPU won't have to work as hard. In normal Windows & typical browsing, the GPU is never the major power draw. So, that's why, in general usage, the 4K OLED will 9 times out of 10 have wildly higher power usage than the FHD IPS. It's a great choice, honestly: HP has done it pretty well. Some other manufacturers really skimped on the batteries, so OLEDs would barely get 3 hours vs 6 hours IPS. It's the same relative difference, but I'd much rather have 9 hours vs 3 hours!
Sorry, there was a problem. Please try again later.from my understanding, most of the (unpredictable) battery drain comes from OLED pixels that constantly shift colors, with white consuming the most amount of power. Changing from UHD to FHD resolution MODES doesn't change the pixel density, so you'll end up with pixels that repeat colors and as a result, doesn't address the fundamental issue with battery drain.
Sorry, there was a problem. Please try again later.The battery life will depend on several things: what programs you are running, if you are playing videos or music, brightness, or active WiFi connection.
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