Laptops with the Best Battery Life
Ranked by real-world battery capacity. Ultrabook scoring applied — portability and all-day runtime weighted above GPU power.
Battery life claims on spec sheets are notoriously optimistic. A "20-hour" laptop often delivers 9–12 hours under typical use. Our ranking uses actual battery capacity (Wh) from hardware specs as the primary sort key — a more honest signal than manufacturer estimates.
The ultrabook scoring profile is active here, which weights portability and efficiency above raw performance. A 72 Wh ARM-based laptop that runs cool and efficient will rank ahead of a 95 Wh gaming machine that burns through power under load.
Most of the laptops in this list pair large battery cells with power-efficient CPUs — the recipe for genuine all-day (and sometimes all-week) computing. Filter by weight below to find a machine that's light enough to actually carry.