Nitro ANV15-51 Battery detected but not charging, BIOS update blocked by low battery?

Here's the problem: When i started my pc Nitro AN515-5 the battery led light up, signaling it works (It does that if i unplug and plug in the cable too), when loaded into Windows it showed up in the bottom right corner, as it should, signaling it's charging. After a couple of minutes it disappeared.
What i did: run dyagnostics and the usual cmd powercfg /batteryreport and powercfg /energy to get the bearing of the situation and in the first minutes the battery actually showed up, working, then it disappeared; I tried to reset the battery (shutting off the pc, unplug, bottom reset button, wait 30 min) and the problem still persisted; last thing was trying to force drivers update and reinstall them by unistalling the battery itself from Windows.

After a few resets (I tried different things for a couple days), now the Battery appears but won't charge. I tried the usual sospects, again, but i don't know ho to proceed further.

Scowering the web i found that i could, theoretically, update the Bios and check if that works but here comes the problem, i cannot update the Bios because the battery it's too low to update, even when pluged in, and i can't update via DOS cause i don't have a USB stick (and i don't want to push my luck in uncharted terrytory for me).

If you need more information about the issue, i can provide more.
Please help me, warranty is still valid on the device and i prefer not to send it away for however long it takes (I use it for work too and don't have another device as a backup)

[Edited the thread to add model name and issue detail to the title]

Accepted answers

Puraw

https://community.acer.com/en/discussion/comment/1349644#Comment_1349644

Hi JediDoc,

Thanks for sharing the battery report. After reviewing the telemetry and recent capacity changes, a few things stand out:

On July 25th, your battery’s full charge capacity dropped from 50.6 mWh to 32.2 mWh, and design capacity plunged to 37.5 mWh. That’s a 38% overnight loss—highly irregular for standard lithium-ion wear.
On July 26th, the report shows no telemetry data at all, which often means the EC couldn’t read the battery’s EEPROM correctly.
Your BIOS version (V1.26, March 21, 2025) is up to date, so the issue isn’t firmware-related.

The symptoms suggest your battery might be refurbished or aftermarket:

Sudden non-linear capacity drops
Charge LED functioning, but Windows failing to register power
Design capacity and firmware inconsistencies breaking EC communication

If that’s the case, OS and BIOS may block telemetry or charging attempts to protect the EC. These issues can’t be fixed by software—they’re hardware-level failures.

💡 Also, if your Nitro ANV15-51 is less than a year old and you’re the original owner, you might still be eligible for a battery replacement under Acer’s warranty. It’s worth contacting support with your SNID and a copy of the report.

Before trying any flash or recalibration work, I’d recommend replacing the battery with an OEM-compatible unit. Here’s a link to a verified replacement battery: Genuine AP21D8M Laptop Battery for Acer Nitro V 15 ANV15-51 AN16-51 5 AN515-58 | eBay

Let me know if you want help checking the battery’s firmware strings or filing a support request with Acer.

All comments

Puraw

https://community.acer.com/en/discussion/727413/nitro-anv15-51-battery-detected-but-not-charging-bios-update-blocked-by-low-battery

Hi JediDoc

You’re looking at a 4-year-old battery, so deterioration is very likely at this point, even if the EC is partly responsible. The system might be misreading the battery state, but it’s important to verify its actual condition first.

To check and share the health report:

Paste this in the command prompt:powercfg /batteryreport

It’ll generate a .html file—open it with your Edge browser. Then press Ctrl + P or right click > Print and select “Print to Microsoft PDF.” Attach the PDF to your reply here.

Please tag @Puraw or use the Quote function when you reply so I get notified.

JediDoc

@Puraw, first thing first, I was looking at the forum earlier and saw a bunch of your replies.
Thank you for taking this time to reply and help me.

Here's the pdf version, it dates a couple of days ago, when i started having problems, and one for today.

Battery Report PDF.pdf

Battery Report 2 PDF.pdf

JediDoc

@Puraw
UP

Puraw

https://community.acer.com/en/discussion/comment/1349644#Comment_1349644

Hi JediDoc,

Thanks for sharing the battery report. After reviewing the telemetry and recent capacity changes, a few things stand out:

On July 25th, your battery’s full charge capacity dropped from 50.6 mWh to 32.2 mWh, and design capacity plunged to 37.5 mWh. That’s a 38% overnight loss—highly irregular for standard lithium-ion wear.
On July 26th, the report shows no telemetry data at all, which often means the EC couldn’t read the battery’s EEPROM correctly.
Your BIOS version (V1.26, March 21, 2025) is up to date, so the issue isn’t firmware-related.

The symptoms suggest your battery might be refurbished or aftermarket:

Sudden non-linear capacity drops
Charge LED functioning, but Windows failing to register power
Design capacity and firmware inconsistencies breaking EC communication

If that’s the case, OS and BIOS may block telemetry or charging attempts to protect the EC. These issues can’t be fixed by software—they’re hardware-level failures.

💡 Also, if your Nitro ANV15-51 is less than a year old and you’re the original owner, you might still be eligible for a battery replacement under Acer’s warranty. It’s worth contacting support with your SNID and a copy of the report.

Before trying any flash or recalibration work, I’d recommend replacing the battery with an OEM-compatible unit. Here’s a link to a verified replacement battery: Genuine AP21D8M Laptop Battery for Acer Nitro V 15 ANV15-51 AN16-51 5 AN515-58 | eBay

Let me know if you want help checking the battery’s firmware strings or filing a support request with Acer.

JediDoc

https://community.acer.com/en/discussion/comment/1349648#Comment_1349648

I'm very thnakful for your response.
I'll contact my Region Acer support ASAP, here in EU we have 2 year warrenty and the product was new so i will strongly demand a battery replacement or a fix in whatever way.
It's just sad: theese laptops don't come cheap and to see theese kind of issues, with a new product, just leaves a bad taste in my mouth. Even more so since it seems to be not uncommon.