#battery test

Z Flip 8 vs Razr 70 Ultra Battery Test: One Full Day, No Charger (2026)

Both phones promise "all-day battery." Only one actually delivered it. After 7 days of real testing — no charger, no cheating — the gap between the Z Flip 8 and Razr 70 Ultra wasn't close. Here's exactly where one of them let me down, and why the numbers on the spec sheet don't tell the whole story.