Redmi K70 Ultra vs Redmi K80

Phone 1

Phone 2

Winner

Xiaomi Redmi K80

Lifespan decides this one: the Redmi K80 is supported until Nov 2029 at $8.59 per month of safe use, while the Redmi K70 Ultra runs out in Jul 2028 ($15.17/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Redmi K70 Ultra 73 · Redmi K80 79 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Xiaomi Redmi K70 Ultra $380

Buy with care$15.17/mo

2024◆ Buy-by Jul 20262028

Xiaomi Redmi K80 $355

Safe to buy$8.59/mo

2024◆ Buy-by Nov 20272029

Category by category

Display

Redmi K70 Ultra 80Redmi K80 80

Both displays are effectively the same class.

Performance

Redmi K70 Ultra 95Redmi K80 92

Performance is a wash — same chip tier.

Camera

Redmi K70 Ultra 67Redmi K80 67

Camera systems are comparable on paper — pick by sample photos.

Battery

Redmi K70 Ultra 90Redmi K80 100

6,550mAh vs 5,500mAh — the Redmi K80 lasts longer between charges.

Software longevity

Redmi K70 Ultra 30Redmi K80 49

The Redmi K80 is supported until Nov 2029 — 16 months longer than the Redmi K70 Ultra.

Value

Redmi K70 Ultra 73Redmi K80 79

Overall value goes to the Redmi K80 at $8.59 per month of safe use.

Full spec table

Spec	Redmi K70 Ultra	Redmi K80
Price (street)	$380	$355
Display	6.67-inch AMOLED, 1.5K, 144Hz, 4000 nits peak, Dolby Vision	6.67-inch AMOLED, 2K, 120Hz, 3200 nits peak
Chipset	MediaTek Dimensity 9300+ (4nm)	Qualcomm Snapdragon 8 Gen 3 (4nm)
RAM	12GB/16GB/24GB	12GB/16GB
Storage	256GB/512GB/1TB	256GB/512GB/1TB
Battery	5,500 mAh	6,550 mAh
Charging	120W wired	90W wired, 30W wireless
Rear cameras	50MP main, 8MP ultra-wide, 2MP macro	50MP main, 8MP ultra-wide, 2MP macro
Dimensions	160.4 × 75.1 × 8.4 mm	160.3 × 75.0 × 8.0 mm
Weight	211 g	206 g
Water resistance	IP68	IP68
Supported until	Jul 2028	Nov 2029

Redmi K70 Ultra full verdict →Redmi K80 full verdict →Longevity master board →

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.