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Power Runaway

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Managing energy consumption in battery-powered electronic gadgets is one of the most difficult engineering tasks. And no one has dine it 100% right. Low power consumption is only achieved through managing the device activity. A device may really be designed to and perform consuming manageable amount of energy, until once in a while it runs away and dies. A 2018 MacBook Pro runs for 8 hours under macOS and only 90 minutes under Windows. The reason? The accelerated graphic card (the ATI Radeon GPU) is tightly managed by macOS (by switching it off and using the integrated low-performance / low-power Intel GPU). Wen booting Windows, the Apple BIOS disables the Intel GPU so Windows has nothing to switch back to and consequently draws batteries at full speed. My Garmin Delta watch has a habit of draining its battery to death in the night when it repeatedly attempts to connect to the iPhone to sync data. I have a habit of leaving the watch on a kitchen table and taking the phone with me to t...