PhoneLifespan

Aquos R9 vs Redmi K80

vs

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 Aquos R9 runs out in Sep 2028 ($20.01/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Aquos R9 57 · 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.

Sharp Aquos R9 $530
Buy with care$20.01/mo
2024◆ Buy-by Sep 20262028
Xiaomi Redmi K80 $355
Safe to buy$8.59/mo
2024◆ Buy-by Nov 20272029

Category by category

Display
Aquos R9 60Redmi K80 80

The Redmi K80's screen is the better one — 6.67-inch amoled, 2k, 120hz, 3200 nits peak.

Performance
Aquos R9 78Redmi K80 92

The Redmi K80's Qualcomm Snapdragon 8 Gen 3 (4nm) is simply the faster chip.

Camera
Aquos R9 67Redmi K80 67

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

Battery
Aquos R9 80Redmi K80 100

6,550mAh vs 5,000mAh — the Redmi K80 lasts longer between charges.

Software longevity
Aquos R9 32Redmi K80 49

The Redmi K80 is supported until Nov 2029 — 15 months longer than the Aquos R9.

Value
Aquos R9 57Redmi K80 79

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

Full spec table
SpecAquos R9Redmi K80
Price (street)$530$355
Display6.5-inch Pro IGZO LTPO OLED, FHD+, up to 240Hz, ~2000 nits peak6.67-inch AMOLED, 2K, 120Hz, 3200 nits peak
ChipsetQualcomm Snapdragon 7+ Gen 3 (4nm)Qualcomm Snapdragon 8 Gen 3 (4nm)
RAM12GB12GB/16GB
Storage256GB256GB/512GB/1TB
Battery5,000 mAh6,550 mAh
ChargingUSB-C wired (no wireless)90W wired, 30W wireless
Rear cameras50MP main, 50MP ultra-wide50MP main, 8MP ultra-wide, 2MP macro
Dimensions156 × 75 × 8.9 mm160.3 × 75.0 × 8.0 mm
Weight195 g206 g
Water resistanceIP68 (also MIL-STD-810G)IP68
Supported untilSep 2028Nov 2029
Aquos R9 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.