Solved! Do laptop batteries have a PS_ON like desktop PSUs?

s355

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May 24, 2021
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I'm wondering if laptop batteries are off unless a PS_ON pin is pulled low, like a desktop PSU.
 

BEAUFORD_SAVAGE

Notable
Sep 6, 2020
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Yes, the onboard switching power supply's are shut down, when you shutdown.
In sleep mode only a tiny amount of power is there on the standby supply to keep whats in RAM from going bye-bye. Similar to your car using a tiny amount of power ( <50mA) when the keys are out to keep the clock info, radio settings, car alarm in standby etc. But WAY lower in laptops.
The exception would be if you put in a after market car alarm on your laptop. ; P Kidding.
 
Last edited:

BEAUFORD_SAVAGE

Notable
Sep 6, 2020
238
27
940
45
Yes, the onboard switching power supply's are shut down, when you shutdown.
In sleep mode only a tiny amount of power is there on the standby supply to keep whats in RAM from going bye-bye. Similar to your car using a tiny amount of power ( <50mA) when the keys are out to keep the clock info, radio settings, car alarm in standby etc. But WAY lower in laptops.
The exception would be if you put in a after market car alarm on your laptop. ; P Kidding.
 
Last edited:
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