Samsung Galaxy Z Fold 7 vs Xiaomi 15

Samsung Galaxy Z Fold 7

Battery life remains the Z Fold 7's most persistent weakness. The 4,400mAh cell has to power two large displays, and while the Snapdragon 8 Elite's efficiency helps, heavy use of the inner display still drains the battery quickly.

• Using primarily the cover display, the Fold 7 can last a full day — but heavy inner screen use cuts that short
• 4,400mAh is an improvement over the Fold 6, but still feels insufficient for a $2,000 device
• 25W charging hasn't improved and feels outdated when competitors offer 65W or faster
• Wireless charging and reverse wireless charging are included, as expected at this price point

Xiaomi 15

A standout category for the Xiaomi 15. The 5,400mAh silicon-carbon battery is a huge upgrade from the Xiaomi 14's 4,610mAh, delivering 16+ hours of active use in GSMArena's tests and consistently 7-8 hours of screen-on time. 90W wired charging goes from 0-100% in about 50 minutes.

• GSMArena Active Use Score of 16:28 hours — excellent endurance for a compact flagship
• 5,400mAh silicon-carbon battery is a massive upgrade from the Xiaomi 14's 4,610mAh — real-world 7-8 hours SOT
• 90W wired charging does 0-100% in about 50 minutes; 50W wireless charging also supported