Samsung S26 Ultra vs iPhone / Google / OnePlus / Oppo / Xiaomi Battery Test

TL;DR

Oppo won with 14h16m despite a smaller battery than rivals, while Google Pixel finished last despite having more capacity than Samsung.

Key Points

• 1.Rankings (longest to shortest): Oppo FindX 9 Pro (14h 16m) → OnePlus 15 (~13h) → Samsung S26 Ultra (12h) → iPhone 17 Pro Max → Xiaomi 17 Ultra → Samsung S25 Ultra → Google Pixel 10 Pro XL (dead first)
• 2.Why Chinese phones have bigger batteries: OnePlus (7,300 mAh) and Oppo (7,500 mAh) use *dual* silicon-carbon cells, bypassing single-cell shipping regulations — a more expensive solution that Samsung, Apple, and Google largely avoid
• 3.Xiaomi underperformed its 6,800 mAh spec because the global variant restricts the cell to comply with shipping regulations, delivering only ~5,400–5,800 mAh of usable capacity
• 4.Google Pixel 10 Pro XL had the worst performance scores (lowest on the entire table, behind even the S25 Ultra), ran the hottest during normal use, and died first — despite having a *larger* battery than Samsung
• 5.Thermal advantage: Samsung S26 Ultra and iPhone 17 Pro Max were the coolest phones (~27°C), both having switched from titanium to aluminum frames this generation, which helped efficiency and likely contributed to the S26 Ultra improving on last year's result