Laptop completely discharging at 88%.

Question

Laptop completely discharging at 88%.

Bhargav Das 20

My laptop is relatively new, Acer swift neo. I require heavy use of the laptop as pdf reader and research paper preparation. Today it randomly discharged from 88% (charged 21 hr ago) to 1% after I opened the laptop (it was shut down).

John Jefferson Doyon 87,160 Reputation points Independent Advisor

2026-08-17T18:45:45.2866667+00:00
Hi, @Bhargav Das

That much battery drain while the laptop is shut down does not sound normal.

To help narrow down the issue:

Did you shut it down using Start > Power > Shut down, or did you just close the lid?

Was anything connected to the laptop while it was off, such as a USB device, dock, or external drive?

Has this happened only once, or has the battery been draining while shut down before?

Also, press Windows + R, type winver and let me know the Windows version and OS build shown.

Click "Add comment" to let me know.

Thanks!
Bhargav Das 20 Reputation points

2026-08-19T14:35:53.7866667+00:00
Thanks for the response! @John Jefferson Doyon

yes indeed, I just closed the lid , but that was supposed to turn the device into sleep mode.

2.yes the usb device which connects to my wireless mouse was connected.

3.it has happened only once, no such problems as of now regarding the power usage or power drain, even in sleep mode.

windows version 25H2 (OS Build 26200.9168).

Answer accepted by question author

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Your answer

John Jefferson Doyon 87,160 Reputation points Independent Advisor

2026-08-17T18:45:45.2866667+00:00

Hi, @Bhargav Das

That much battery drain while the laptop is shut down does not sound normal.

To help narrow down the issue:

Did you shut it down using Start > Power > Shut down, or did you just close the lid?

Was anything connected to the laptop while it was off, such as a USB device, dock, or external drive?

Has this happened only once, or has the battery been draining while shut down before?

Also, press Windows + R, type winver and let me know the Windows version and OS build shown.

Click "Add comment" to let me know.

Thanks!
Bhargav Das 20 Reputation points

2026-08-19T14:35:53.7866667+00:00

Thanks for the response! @John Jefferson Doyon

yes indeed, I just closed the lid , but that was supposed to turn the device into sleep mode.

2.yes the usb device which connects to my wireless mouse was connected.

3.it has happened only once, no such problems as of now regarding the power usage or power drain, even in sleep mode.

windows version 25H2 (OS Build 26200.9168).

Answer 1

Thanks for the response! @John Jefferson Doyon yes indeed, I just closed the lid , but that was supposed to turn the device into sleep mode. 2.yes the usb device which connects to my wireless mouse was connected. 3.it has happened only once, no such problems as of now regarding the power usage or power drain, even in sleep mode. windows version 25H2 (OS Build 26200.9168).

Thanks for the details.

Since the laptop was in Sleep rather than fully shut down, the battery can continue to drain. It may also wake briefly in the background, and the connected USB mouse receiver can contribute to wake activity.

Because this happened only once and the battery is behaving normally now, I would monitor it for the moment.

If you want to avoid this during long periods when the laptop is not being used, use Hibernate or Shut down instead of Sleep.

If the sudden battery drain happens again, run: powercfg /sleepstudy

That report can help identify what was using power while the laptop was sleeping.

For now, there is no clear sign of a battery hardware problem based on a single occurrence.

Click "Add comment" to let me know.

Thanks!