Why Does My Smartphone Battery Die in One Day?
summary
Measures why smartphone batteries drain quickly by quantifying component currents (example: ~1800 mAh battery, Nexus 5 screen ~221 mA, CPU spikes ~400 mA) and showing small behaviors that dominate consumption — e.g., a gyroscope listener doubling idle draw and tiny periodic network bursts causing most radio energy. Uses tools and fixes from the Volta/Doze era (ARO, Battery Historian), a power monitor and Arduino probe to record current traces, and recommends concrete remedies: reduce sensor sampling, batch network I/O, and avoid wakelocks.
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chapters (9)
- 0:00Start
- 4:01EVOLUTION OF BATTERY INFO
- 7:59PHONE CONSUMPTION
- 10:36HARDWARE ARCHITECTURE
- 12:52SENSORS
- 24:19A MATTER OF PERSPECTIVE...
- 28:03RRC STATE MACHINE IN 4G
- 30:36FAST DORMANCY
- 36:17IT'S (UNFORTUNATELY) SO TRUE...
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