When Intel launched its “Panther Lake” Core Ultra Series 3 chips, the company promised up to 27 hours of battery life. That was a bold claim — one I initially dismissed as standard marketing hype. However, there was a tiny part of me that thought Intel might not just be blustering this time. After having tested several Panther Lake laptops, I can say that my gut reaction wasn't unfounded.
While the Samsung Galaxy Book 6 Pro and Asus Zenbook Duo (2026) deliver excellent battery life for the best Windows laptops, they didn’t last anywhere close to 27 hours in our testing. Why? Because they’re high-end models with power-hungry OLED panels.
