Samsung claims 40-hour battery life for Galaxy Watch 9 but that is a lab number. Real GPS running kills it in 6 hours. Sleep tracking costs 10-15% nightly. Here is the honest battery breakdown across fitness, travel, daily use, and sleep scenarios.
Galaxy Watch 9
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Your Galaxy Watch 9 isn’t magic—it has real limitations when tracking health metrics compared to medical-grade devices. Here’s what actually matters for your fitness monitoring.