Laptop Battery Hours: Manufacturer Claims vs PCMag's Measured Results (2026)

Short answer: A battery number only means something when you know the test. In PCMag’s 2026 reviews, the HP OmniBook 5 14 measured 34 hours 48 minutes, the MacBook Neo measured 15 hours 35 minutes, and the Dell XPS 13 lasted more than 20 hours (PCMag OmniBook 5 14, PCMag MacBook Neo, PCMag XPS 13). Each figure comes from one video-playback test, so use them to rank the three machines, not to predict your own day.

Why the test matters more than the number

Battery life depends on what you do. Streaming a video at moderate brightness uses far less power than running a video call, a browser full of tabs or a photo editor. A manufacturer’s figure is usually measured under the most favorable settings, and the reviewer’s figure is measured under a fixed setting they choose. Neither is wrong, but neither is your day.

PCMag’s method is simple, and it is written down in each review. It plays a locally stored 720p copy of the open-source Blender film Tears of Steel, with display brightness at 50% and audio at 100%. The battery is fully charged beforehand, and Wi-Fi and keyboard backlighting are turned off (PCMag OmniBook 5 14 review). That is a repeatable test, which is what makes the three results comparable with each other.

HP OmniBook 5 14: a claim that held up

HP’s claim for the OmniBook 5 14 is about 34 hours of battery life. PCMag’s test measured 34 hours 48 minutes, and the review says that confirmed HP’s claim with nearly an hour to spare (PCMag OmniBook 5 14 review). PCMag also says the laptop outlasted the next-best machines in its group by more than 14 hours (PCMag OmniBook 5 14 review).

PCMag does not treat the number as a free pass. It notes that the OmniBook’s 1920 x 1200 screen is not very high in resolution, and that its brightness at 50% is comparatively dim. Both of those help a laptop last longer in a video test (PCMag OmniBook 5 14 review). A brighter screen or heavier workload will shorten the result.

MacBook Neo: close to Apple’s claim, not a record

PCMag’s MacBook Neo review measured 15 hours 35 minutes in the same kind of video test. Apple claims 16 hours of video playback for the Neo, and PCMag says the measured figure comes within spitting distance of that claim (PCMag MacBook Neo review).

PCMag also places the Neo in context. Its figure is not one of the 25-hour-plus results it has recorded for other MacBooks. The review says the Neo outlasted the two Intel-based budget laptops in its comparison group by a good margin, while the Snapdragon X laptop in the same group lasted close to 30 hours (PCMag MacBook Neo review). So a strong result does not mean the best result in every group.

Dell XPS 13: over 20 hours, with a brightness note

PCMag’s XPS 13 review says the laptop lasted more than 20 hours in its test (PCMag XPS 13 review). The review describes that as long enough to support a highly mobile lifestyle.

The same review also says the XPS 13’s screen looked dim to the reviewer at 50% brightness, and that the matte finish dulls the image (PCMag XPS 13 review). PCMag calls the OmniBook’s brightness comparatively dim at 50%, so the two machines are judged under similar conditions in that respect. A brighter setting will use more power on either one.

How to read a battery claim

Use this checklist when you see any battery figure on a product page or in a review:

1. Find the test. Is it video playback, web browsing or a mixed workload? A video loop is a light, fixed load.
2. Find the brightness. A figure at 50% brightness will be higher than one at full brightness.
3. Find the connection settings. PCMag turned off Wi-Fi and keyboard backlighting in its test (PCMag OmniBook 5 14 review). Your own settings may differ.
4. Compare like with like. Only compare results from the same method, or across reviews that describe their methods.
5. Read the caveats. PCMag’s OmniBook review gives its own reasons for the result, which is more useful than the headline number (PCMag OmniBook 5 14 review).

Which buyer should care most

Battery life matters most to students who work in libraries and classrooms without a charger nearby, to travelers who spend long days away from power, and to anyone who plans to use the laptop unplugged for most of the day. If you mostly work at a desk near an outlet, a difference of a few hours will matter less than memory, ports or screen quality.

Limits of a battery test

These results come from one reviewer per laptop, using one video-playback test each (OmniBook 5 14, MacBook Neo, XPS 13). They cannot tell you how a laptop will behave with your browser tabs, your video calls or your creative software. They also do not cover battery wear over several years, which depends on charging habits and time. The published claims from the manufacturers are not verified here beyond what PCMag reports. For the full comparison of the OmniBook and the XPS 13, see the Dell XPS 13 and HP OmniBook 5 14 comparison. Ranking method: methodology.