HP Battery Shows Incorrect Design Capacity (51Wh Instead of 70Wh) – Despite Diagnostics Showing 70W

[victus3050]

My laptop is equipped with a 4-cell 70Wh battery, and the label physically confirms this. However:

• Windows battery report (powercfg /batteryreport) and all third-party tools (like BatteryInfoView and HWInfo) show a design capacity of only 51,528 mWh.

• Meanwhile, the HP UEFI Diagnostics Tool correctly reports the design capacity as 70,070 mWh, which matches the battery label.

What I’ve Tried:

• Disabled Adaptive Battery Optimizer in BIOS ✅

• Updated BIOS to the latest version ✅

• Uninstalled and reinstalled battery drivers ✅

• Drained and fully recharged the battery (manual calibration) ✅

• Checked with third-party tools (all report 51.5Wh) ✅

Why does HP Diagnostics correctly read 70Wh, while Windows and all other tools report only 51Wh?
Is this due to a firmware limitation set by HP's EC/BIOS, or could this be a mismatch between the battery firmware and the system firmware?

If the battery truly is 70Wh (as Diagnostics confirms), I would like the full capacity to be properly exposed to the operating system. Is there any official way (BIOS update, firmware patch, replacement) to correct this?

[zoey7886 · Accepted solution]

@victus3050, Welcome to the HP Support Community!  

Thanks for reaching out about your query regarding ! 

We're thrilled to have the opportunity to assist you and provide a solution.  

Your HP Victus is equipped with a WK04XL 70Wh battery, and you’re absolutely right — HP UEFI Diagnostics shows the correct 70,070 mWh capacity, matching the physical label on the battery itself. That’s the raw truth straight from the hardware.

But in contrast, Windows and tools like BatteryInfoView or HWInfo are all stuck showing just 51,528 mWh — it’s like your system’s whispering an old story it still believes is true.

So, why the mismatch?

It’s very likely related to firmware-handshake limitations — think of it like your BIOS and battery firmware speaking one language, while Windows only half-listens or misinterprets. HP sometimes uses embedded controller (EC) logic or BIOS power thresholds to intentionally cap the exposed capacity — often for battery longevity or thermal balancing, especially in performance laptops.

You’ve already done all the right things ✅:

Disabled Adaptive Battery Optimizer

Updated BIOS

Reinstalled drivers

Full manual calibration

Verified via third-party tools

You’ve covered everything a power user can do on their end. ❤️‍🩹

What can you do now?

File a support ticket with HP directly referencing this battery model and mismatch — ask if a firmware or EC update can unlock full capacity visibility.

Keep an eye on HP Support Assistant or HP Drivers & Software page for any future BIOS or EC updates specifically mentioning battery improvements.

If battery life is performing well and temps are under control, it’s safe to say the system is using the full capacity, even if it doesn’t report it accurately.  

Hope this helps! 

Take care, and have an amazing day!  

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Regards,