Notebookcheck reported 22.6 hours for a Lenovo ThinkPad P1 Gen 9 in its Wi-Fi v1.3 battery test, with the screen set to 150 cd/m². That result belongs to a specific 90 Wh configuration, not to every Panther Lake laptop.
What the ThinkPad P1 Gen 9 result measures
The tested ThinkPad P1 Gen 9 was model 21UE000MGE, configured with an Intel Core Ultra 7 366H, an Nvidia RTX PRO 2000 Blackwell Generation Laptop GPU and a 90 Wh battery. Notebookcheck called the runtime its best measured result for the ThinkPad P1 line.
That makes 22.6 hours a useful reference for this particular Wi-Fi test and configuration. It does not predict how long a different laptop will last while playing video or running office applications.
Panther Lake runtimes vary with the laptop and workload
Other reviews reported different runtimes on different systems. PCWorld measured its Asus ZenBook Duo UX8407A, with a Core Ultra X9 388H and a 99 Wh battery, at about 22 hours in a continuous 4K-video loop using one 2K display. In the same laptop, its Procyon Office workload lasted just under 14 hours. Just Josh reported about 10 hours in power-efficiency mode and 9 hours in balanced mode for the HP OmniBook X 16.
| Laptop and configuration | Workload or mode | Reported runtime | Test conditions |
| Lenovo ThinkPad P1 Gen 9, 21UE000MGE; Core Ultra 7 366H; 90 Wh battery | Wi-Fi v1.3 | 22.6 hours | Screen brightness: 150 cd/m² |
| Asus ZenBook Duo UX8407A; Core Ultra X9 388H; 99 Wh battery | Continuous 4K-video loop | About 22 hours | One 2K display used; laptop in clamshell mode |
| Asus ZenBook Duo UX8407A; Core Ultra X9 388H; 99 Wh battery | Procyon Office | Just under 14 hours | Office workload simulation |
| HP OmniBook X 16 | Power-efficiency mode | About 10 hours | Reviewer described this as a tougher battery test |
| HP OmniBook X 16 | Balanced mode | 9 hours | — |
A video loop and an office simulation measure different kinds of use. The runtime that matters most depends on whether your day looks more like one repeated media task or a mix of active work. The ThinkPad result is a Wi-Fi-browsing measurement; it is not a shared test score for the other laptops.
Compare battery-life figures by matching the workload first. A video-loop result and an office-work result answer different questions.
Just Josh's HP OmniBook X 16 review reports its battery-test results.
What reviewers found about performance on battery power
Battery runtime and unplugged speed are separate measures. On its ZenBook Duo, PCWorld reported about 20% lower performance on battery in Procyon Office, and about 3% lower performance in its custom Handbrake transcode and PugetBench Photoshop tests.
Just Josh separately reported that its Panther Lake Duo maintained full Cinebench and gaming performance while unplugged. Those observations concern different systems and benchmark workloads, so they describe specific test results rather than a single battery-mode rule for Panther Lake laptops.
Just Josh discusses Panther Lake performance and battery behavior.
