Is My Ethernet Cable Draining Laptop Battery?

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Discussion Overview

The discussion centers around the potential impact of an ethernet cable on laptop battery drain. Participants explore whether the ethernet connection could be responsible for a noticeable decrease in battery power when the laptop is not in use, considering various technical aspects and user experiences.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes a consistent battery drain of 4-6% when the laptop is connected only to the ethernet cable, suggesting it could be the cause.
  • Another participant humorously suggests unplugging the ethernet cable to investigate the issue further.
  • A participant mentions that the ethernet card might have remote-wake capabilities, which could contribute to battery drain, and suggests disabling this feature.
  • It is noted that laptops naturally lose battery power over time, even when not in use, due to inherent inefficiencies in battery technology.
  • One participant points out that standby modes and electronic power switches in modern computers can draw current, potentially affecting battery life.
  • A later reply indicates that the laptop still experienced a 2-3% battery drain overnight without any connections, implying that other factors may also be at play.

Areas of Agreement / Disagreement

Participants express varying opinions on the extent to which the ethernet cable contributes to battery drain. While some suggest it could be a factor, others highlight that battery discharge occurs naturally, indicating no consensus on the primary cause of the observed battery loss.

Contextual Notes

Participants mention potential technical features like remote-wake capabilities and standby modes, but do not provide detailed explanations or confirm their effects on battery life. The discussion reflects uncertainty about the specific reasons for battery drain in the context of laptop usage.

Who May Find This Useful

Users experiencing unexplained battery drain on laptops, particularly those using ethernet connections, as well as individuals interested in laptop power management and battery technology.

DrKareem
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It is the second occurrence. In the morning, when i turn on my computer, i figure out that it has around 4-6% battery powe missing. At night, only the ethernet cable (and usb mouse, but i eleminated it as a suspect for the power theft :cool: ) is plugged in.

So could be that the thief here is the ethernet cable??
 
Computer science news on Phys.org
So, be a scientist. Unplug the ethernet cable tonight & see what happens. :biggrin:
 
Yes, that I will do. I will uncover the culprit behind this. :D
 
Your ethernet card might have remote-wake capability, meaning it stays awake listening for instructions to boot the computer up. You might want to use whatever utilities that came with the card/computer to disable remote wake. You might be able to make this change in Windows XP, but in the old days you had to use a vendor-provided utility.

On the other hand, it's a laptop -- batteries will slowly discharge even when nothing is connected to them, because they are not perfect.

- Warren
 
most computers today use standby modes and electronic power switches these draw
some current and there could other standby modes in the computer especially
in laptops
 
Yes, I think this is the reason. I left the laptop overnight without being plugged to either a power source or to ethernet cable, and still there was around 2-3% battery power missing. Thanks for your replies all.
 

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