Lenovo ThinkPad L13 Gen 4 (Intel) review – light business notebook with quiet cooling fan
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
| Intel Core i5-1335U (15W TDP) | 0:02 – 0:10 sec | 0:15 – 0:30 sec | 10:00 – 15:00 min |
|---|---|---|---|
| Lenovo ThinkPad L13 Gen 4 (Intel) | 3.24 GHz @ 2.34 GHz @ 79°C @ 33W | 3.12 GHz @ 2.29 GHz @ 89°C @ 32W | 1.72 GHz @ 1.39 GHz @ 65°C @ 15W |
| HP EliteBook 640 G10 | 3.78 GHz @ 2.88 GHz @ 83°C @ 50W | 2.75 GHz @ 1.96 GHz @ 77°C @ 26W | 2.35 GHz @ 1.77 GHz @ 76°C @ 23W |
| Acer TravelMate P4 (TMP413-51) | 3.52 GHz @ 2.67 GHz @ 77°C @ 44W | 3.27 GHz @ 2.45 GHz @ 82°C @ 41W | 2.16 GHz @ 1.67 GHz @ 64°C @ 22W |
| HP EliteBook 650 G10 | 3.73 GHz @ 2.87 GHz @ 88°C @ 49W | 2.81 GHz @ 2.09 GHz @ 90°C @ 29W | 2.50 GHz @ 1.88 GHz @ 81°C @ 24W |
| HP 250 G10 | 3.33 GHz @ 2.46 GHz @ 73°C @ 40W | 3.08 GHz @ 2.23 GHz @ 85°C @ 35W | 2.11 GHz @ 1.76 GHz @ 76°C @ 22W |
| ASUS Vivobook 17 F1704 (X1704) | 3.10 GHz @ 2.14 GHz @ 71°C @ 30W | 3.09 GHz @ 2.16 GHz @ 89°C @ 30W | 1.97 GHz @ 1.67 GHz @ 70°C @ 18W |
| ASUS Vivobook 15 F1504 (X1504) | 2.99 GHz @ 2.07 GHz @ 66°C @ 28W | 2.94 GHz @ 2.07 GHz @ 81°C @ 28W | 2.02 GHz @ 1.68 GHz @ 75°C @ 18W |
| Acer Aspire 5 (A515-58M) | 2.05 GHz @ 2.74 GHz @ 61°C @ 47W | 1.81 GHz @ 2.54 GHz @ 64°C @ 40W | 1.22 GHz @ 2.23 GHz @ 61°C @ 28W |
| HP ProBook 440 G10 | 2.39 GHz @ 2.93 GHz @ 93°C @ 50W | 1.51 GHz @ 2.29 GHz @ 92°C @ 30W | 0.94 GHz @ 1.87 GHz @ 72°C @ 19W |
| HP ProBook 450 G10 | 3.41 GHz @ 2.79 GHz @ 94°C @ 48W | 2.80 GHz @ 2.17 GHz @ 94°C @ 31W | 1.87 GHz @ 2.04 GHz @ 81°C @ 23W |
| Acer Swift Go 16 (SFG16-71) | 3.29 GHz @ 2.46 GHz @ 65°C @ 45W | 3.06 GHz @ 2.37 GHz @ 71°C @ 42W | 1.80 GHz @ 1.98 GHz @ 61°C @ 28W |
| Lenovo ThinkBook 14s Yoga Gen 3 | 1.91 GHz @ 1.20 GHz @ 63°C @ 19W | 1.86 GHz @ 0.90 GHz @ 74°C @ 14W | 1.83 GHz @ 0.90 GHz @ 60°C @ 13W |
The Core i5-1335 inside this laptop can sustain decently high clocks in short and medium loads at the expense of high CPU temperature (in the second column). This isn’t an issue in the long run but the frequencies and the power limit are low.
Comfort during full load
Just like many other business-oriented Lenovo devices, the power modes are integrated into the base Windows Power presets for faster switching.
In idle, the fan is quiet and its speed is around 2400 RPM. During CPU full load, the fan is rotating with ~ 4100 RPM and surprisingly the noise is fairly low. In this case, the keyboard feels a bit warm to the touch which is okay since it’s not too hot for normal work.
Idle
Max CPU loadBattery
Now, we conduct the battery tests with 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 46Wh battery lasts for 12 hours and 30 minutes of either Web browsing or video playback. To achieve that, you have to apply the “Balanced” preset in the Windows “Power & Battery” menu and set the “Scheme for Battery” to “Balanced” mode in the BIOS.
Brightness: 180 nits; Display Mode: SDR
Time to Full Discharge: Higher is Better
In order to simulate real-life conditions, we used our own script for automatic web browsing through over 70 websites.
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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