Battery problem after BIOS upgrade

[Paul3058]

My battery discharged and would not charge after upgrading the BIOS to F29 Rev.A (Sep 17 2025).  The diagnostic showed RE00W status (replace battery).  I downgraded the BIOS to F.26 Rev.A (Sep 11 2024) and the battery is now charging.  I know that there was another version in between, but I couldn't remember when I last upgraded.

[VikramTheGreat · Accepted solution]

Hi @Paul3058,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

Thank you for sharing those details. This is very insightful and confirms what many users experience after certain BIOS updates. Here’s what’s happening and what you can do:

Why This Happened

• BIOS updates often include power management changes that affect battery charging thresholds and communication with the Embedded Controller (EC).
• The F.29 Rev.A (Sep 17, 2025) update likely introduced stricter battery health checks or altered charging logic, causing the battery to report RE00W (Replace Battery) even though it was functional.
• Downgrading to F.26 Rev.A (Sep 11, 2024) restored previous charging behavior, which suggests the newer BIOS may have compatibility issues with your battery firmware.

What You Can Do

1. Check HP Release Notes
   • HP often lists fixes or known issues in BIOS release notes.
   • If F.29 introduced changes for battery calibration or Instant Ink security, it might have unintended side effects.
      
2. Update to the Intermediate Version
   • There was likely an F.27 or F.28 between your versions.
   • These may have addressed battery compatibility without the stricter checks in F.29.
      
3. Run Battery Calibration
   • In HP Diagnostics (UEFI or HP Support Assistant), run Battery Calibration after any BIOS change.
      
4. Monitor HP Support Page
   • HP may release F.30 or later to fix this issue.
   • Keep an eye on Official HP® Support.

I hope this helps.

Take care and have an amazing day!
 

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Regards,

VikramTheGreat