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The controversy first emerged in late-2016, when it was reported that since a recent iOS update, some iPhone handsets had begun to experience unexpected shutdowns when their battery capacity reached 30%, caused by drops in the battery's terminal voltage below a threshold of around three volts required for operation of the device.
At the same time, they are switched off (but are designed to draw some power) or in standby mode. It only occurs because some devices claim to be "switched off" on the electronic interface but are in a different state. Switching off the plug or disconnecting it from the power point can completely solve the problem of standby power.
Users say they have failed to wake up because of problems with sound
Disabling Wake-on-LAN, when not needed, can slightly reduce power consumption on computers that are switched off but still plugged into a power socket. [6] The power drain becomes a consideration on battery-powered devices such as laptops as this can deplete the battery even when the device is completely shut down.
An adapter reserving the charging port can retrofit the plug. Battery-powered, wireless Bluetooth headphones are an alternative. Those tend to be costlier however due to their need for internal hardware such as a Bluetooth transceiver and a battery with a charging controller, and a Bluetooth coupling is required ahead of each operation. [249]
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The most notable difference from modern 20/24-pin ATX power connectors is that the AT power supply connector did not have a signal to turn on the power supply, and also did not supply separate, "always-on" +5V standby power. The power supply was instead turned on and off via a mechanical switch that disconnected mains power.