Dell Latitude 15 5540 review – tuned for comfort

Temperatures and comfort, Battery Life

Max CPU load

In this test we use 100% on the CPU cores, monitoring their frequencies and chip temperature. The first column shows a computer’s reaction to a short load (2-10 seconds), the second column simulates a serious task (between 15 and 30 seconds), and the third column is a good indicator of how good the laptop is for long loads such as video rendering.

Average P-core frequency; Average E-core frequency; CPU temp.; Package Power

The optional Core i7-1355U inside Latitude 15 5540 can maintain impressively high clocks in short loads. In prolonged periods of 100% CPU stress, the CPU can sustain almost the same frequencies as the more premium Latitude 16 7640.

Comfort during full load

The power presets are located in the BIOS. In “Ultra Performance” mode, the fan is almost quiet even in full processor loads. At the same time, the keyboard deck doesn’t feel hot to the touch so you can use the machine comfortably for work.

Battery

Now, we conduct the battery tests with the Windows Better performance setting turned on, screen brightness adjusted to 120 nits and all other programs turned off except for the one we are testing the notebook with. The 54Wh battery pack lasts for 12 hours and 30 minutes of Web browsing, or 8 hours and 20 minutes of video playback. The result is good. To achieve that, you have to apply the “Balanced” preset in the Windows “Power & Battery” menu and select the “Optimized” power plan in the BIOS.

Video playback

Brightness: 180 nits; Display Mode: SDR
Time to Full Discharge: Higher is Better

Dell Latitude 5540 54Wh, 3-cell

8h 47m

Dell Latitude 7640 57Wh, 3-cell

10h 33m+20.1%

Dell Vostro 3530 54Wh, 4-cell

6h 47m-22.8%

Lenovo ThinkPad L15 Gen 4 57Wh

5h 56m-32.4%

HP ZBook Firefly 16 G10 76Wh, 4-cell

11h 05m+26.2%

Dell Latitude 3540 54Wh, 3-cell

7h 25m-15.6%

Acer TravelMate P2 53Wh

7h 18m-16.9%

HP EliteBook 860 G10 51Wh, 3-cell

8h 37m-1.9%

HP Pavilion 15 41Wh, 3-cell

5h 56m-32.4%

Web surfing

In order to simulate real-life conditions, we used our own script for automatic web browsing through over 70 websites.

Dell Latitude 5540 54Wh, 3-cell

12h 30m

Dell Latitude 7640 57Wh, 3-cell

12h 30m

Dell Vostro 3530 54Wh, 4-cell

10h 00m-20%

Lenovo ThinkPad L15 Gen 4 57Wh

8h 20m-33.3%

HP ZBook Firefly 16 G10 76Wh, 4-cell

25h 00m+100%

Dell Latitude 3540 54Wh, 3-cell

9h 05m-27.3%

Acer TravelMate P2 53Wh

10h 00m-20%

HP EliteBook 860 G10 51Wh, 3-cell

10h 00m-20%

HP Pavilion 15 41Wh, 3-cell

8h 20m-33.3%

Author: Nikolay Palaozov

Author: eng. Kroum NikolovHead of Engineering at LaptopMedia.com, inventor and innovator with 40+ years of experience in electronics and high technology.

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