Lenovo Yoga Book 9i (13″) review

Lenovo Yoga Book 9i (13″) — the battery-first convertible whose performance band shows its tier

The Yoga Book 9i 13" at $921 is a 2023 convertible built on a Core i5 1335U with 32 GB of RAM. Battery capacity is the flagged strength at 80 Wh — 48% above the convertible-class median of 54 — while overall performance is the flagged weakness at 25.77, 31% below the class median. The integrated GPU is the only graphics this configuration carries.

Where it holds up

Portability posts 79 (high), the natural dividend of a 13-inch convertible body, and office productivity reads 77.26 (high) — the strongest compute axis on the card. Photo design lands at 37 (mid) for light editing duty. The 80 Wh cell in a 13-inch chassis is the headline: class-plus battery in a size that rarely carries it.

Where it falls short

Overall performance at 25.77 (low) is the honest cost of the U-series tier, and the low bands cluster behind it: gaming 23, modeling 21, engineering CAD 25. Value reads 14.8 (low) — capability per dollar trails the class. No depreciation anchor is recorded (base $0); the 2023 cohort rate is 12.87% per year, mid-curve.

Price and depreciation

No anchor means no curve or projection; the 12.87% class rate describes a still-settling tier. At $921 the ask prices the battery and the form factor, not the compute.

Alternatives to consider

In this list, the Yoga 9i Gen 8 at $921 matches the battery emphasis with a stronger office showing; the Surface Pro 9 at $783 offers similar portability (91.7 top) with the same U-tier ceiling; and the Yoga 7 Gen 10 at $1,275 is the newer-platform step if the budget stretches.

Bottom line

Fairly priced for the class. An endurance-first 13-inch convertible: 80 Wh of battery and portability 79 high against performance 25.77 low and value 14.8 low. Best for writers and browsers, not for creators in a hurry.