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Razer Blade 15 OLED battery life and power consumption comparison: Bigger differences than expected

Razer Blade 15 OLED battery life and power consumption comparison
Razer Blade 15 OLED battery life and power consumption comparison
IPS vs. OLED: The difference between minimum brightness and maximum brightness on an OLED display could be as much as 15 W compared to about 5 W on a typical IPS display. On the other hand, the difference could be as small as 2 W to 3 W when displaying dark-colored web pages.

OLED displays are about to get a lot more common on gaming notebooks now that Samsung has started mass producing 15.6-inch 4K UHD panels as unveiled at CES 2019. We recently had a chance to check out the 2019 Razer Blade 15 equipped with such an OLED panel to get a better idea of how it compares to the everyday IPS option at the power consumption level.

The table below shows how much power the Razer Blade 15 OLED and Chuwi LapBook Plus will each demand from the outlet when displaying all black at minimum and maximum brightness settings and all white at minimum and maximum brightness settings. Ideally, we would be comparing the Blade 15 OLED with the Blade 15 IPS, but the latter was unavailable for this particular comparison. The inexpensive Chuwi was chosen instead for its 15.6-inch 4K UHD IPS display.

The data confirms what we already know about OLED: displaying white will consume more power than displaying black while there is no measurable difference on the IPS laptop. Power consumption from an OLED panel will be dependent on onscreen content while the inverse is true on an IPS panel. At the most extreme setting of maximum brightness on an all-white screen, our OLED example will demand about 3x more power than our IPS example (4.6 W vs. 14.5 W).

Brightness is an important variable worth mentioning. The Razer system is brighter than the Chuwi when at their respective maximum settings (~470 nits vs. 360 nits). Nonetheless, the same general conclusions can be drawn for the purposes of this comparison.

Black Screen on Minimum Brightness (W)Black Screen on Maximum Brightness (W)Power Consumption DifferenceWhite Screen on Minimum Brightness (W)White Screen on Maximum Brightness (W)Power Consumption Difference
Razer Blade 15 OLED12.212.2012.52714.5
Chuwi LapBook Plus6.911.54.66.811.44.6
Blade 15 OLED power consumption when displaying all black at the minimum brightness setting
Blade 15 OLED power consumption when displaying all black at the minimum brightness setting
Blade 15 OLED power consumption when displaying all black at the maximum brightness setting
Blade 15 OLED power consumption when displaying all black at the maximum brightness setting
Blade 15 OLED power consumption when displaying all white at the minimum brightness setting
Blade 15 OLED power consumption when displaying all white at the minimum brightness setting
Blade 15 OLED power consumption when displaying all white at the maximum brightness setting
Blade 15 OLED power consumption when displaying all white at the maximum brightness setting

Of course, an all-black or all-white screen is not representative of everyday loads and so we're also interested in the power consumption when displaying different web pages. For this comparison, we chose to display the Blizzard Battle.net news page and the Notebookcheck home page on the Blade 15 OLED as these are mostly dark and white in color, respectively. Interestingly, the difference in consumption between the minimum and maximum brightness settings when displaying the Blizzard page is just a couple of Watts compared to 15 W on the Notebookcheck page. These results are surprisingly very close to the "extreme" all-black and all-white results above.

Blizzard web page at Minimum Brightness (W)Blizzard web page at Maximum Brightness (W)Notebookcheck web page at Minimum Brightness (W)Notebookcheck web page at Maximum Brightness (W)
Razer Blade 15 OLED12.114.612.327.2
We use the Blizzard Battle.net news homepage for our example of a mostly dark web page
We use the Blizzard Battle.net news homepage for our example of a mostly dark web page
We use the Notebookcheck homepage for our example of a mostly white web page
We use the Notebookcheck homepage for our example of a mostly white web page
Blade 15 OLED power consumption when display the Blizzard page at the minimum brightness
Blade 15 OLED power consumption when display the Blizzard page at the minimum brightness
Blade 15 OLED power consumption when display the Blizzard page at the maximum brightness
Blade 15 OLED power consumption when display the Blizzard page at the maximum brightness
Blade 15 OLED power consumption when display the Notebookcheck page at the minimum brightness
Blade 15 OLED power consumption when display the Notebookcheck page at the minimum brightness
Blade 15 OLED power consumption when display the Notebookcheck page at the maximum brightness
Blade 15 OLED power consumption when display the Notebookcheck page at the maximum brightness

Battery life will be more variable since the power consumption of OLED depends more heavily on both the colors and brightness setting. We're able to record a runtime of 9 hours and 43 minutes when idling on an all-white screen at minimum brightness compared to just 4 hours and 19 minutes when idling on an all-white screen at maximum brightness. We admit that this may be an unrealistic example, but the nearly 6-hour difference is something we weren't expecting and definitely worth noting.

For a more apples-to-apples comparison, we set the Blade 15 OLED to 150 nits while running our in-house WLAN test that loads different — albeit mostly white — web pages every 40 seconds. Runtime would last for just under 6 hours before automatic shutdown to be about 30 minutes shorter than the Blade 15 IPS SKU under the same conditions. Expect your own results to vary much more than a typical IPS alternative. In fact, we recommend using darker Widows Explorer color schemes and wallpapers for your OLED laptop whenever possible to prolong runtimes.

For more information on the display differences between the Blade 15 OLED and IPS SKUs, see our comparison page here.

  White Screen on Minimum Brightness (h:mm)
 White Screen on Maximum Brightness (h:mm)
WLAN load at 150 nits Brightness (h:mm)  
Razer Blade 15 OLED (4K, 60 Hz) 9:434:19  5:59
Razer Blade 15 IPS (1080p, 240 Hz)    6:33


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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2019 07 > Razer Blade 15 OLED battery life and power consumption comparison: Bigger differences than expected
Allen Ngo, 2019-07- 7 (Update: 2019-07- 9)
Allen Ngo
Allen Ngo - US Editor in Chief
After graduating with a B.S. in environmental hydrodynamics from the University of California, I studied reactor physics to become licensed by the U.S. NRC to operate nuclear reactors. There's a striking level of appreciation you gain for everyday consumer electronics after working with modern nuclear reactivity systems astonishingly powered by computers from the 80s. When I'm not managing day-to-day activities and US review articles on Notebookcheck, you can catch me following the eSports scene and the latest gaming news.