HP laptop battery capacity (mWh) discrepancy between HP Diagnostics vs Win10 Battery Report

[mehwhatever]

Hi,

I have an almost 3 year old HP 15-AU123CL laptop that is almost always plugged in to the wall.  It works fine, no complaints, I'm not a heavy user.  About 3 weeks ago, I decided to replace my HHD with an SSD, which worked out fine.  The problem was that when I opened up the computer, I noticed that the HP OEM battery (BP02XL) was bulging, to the point where the screws holding it in place were a little hard to take off -- Battery reports and HP diagnostics and such said that the battery was fine, just a little wear and tear.  HP said that the battery won't explode, but highly recommended to get it replaced ASAP. So I got a Chinese 3rd party battery for cheap ~$40.

So the 3rd party battery is advertised as having the same specs as the OEM battery:

41 mWh,   7.7 v,   5150 mAh.

The value that I get when I generate a Battery Report (Command Prompt>powercfg /batteryreport), I see ~ 33 mWh instead of the expected 41 mWh.  The Amazon vendor told me to calibrate and dis/charge, which I did, but it only went up a tiny bit, and after the last dis/charge/calibration, it's down to 31.6 mWh.  And I did the Uninstall MS ACPI-complaint control method battery driver,  powering down, take out battery and wait 60 seconds, that whole thing.

But the confusion is that when I perform HP Support Assistant > HP Battery Check, it says that it's 4160 mWh.  HP PC HARDware diagnostics Windows also says 4160 mWh.  The HP PC Hardware Diagnostics UEFI which I ran as I booted up (ESC, F2) also says 4160 mWh.

So which one is the right value?  Are the HP programs just pulling that 4160 mWh value out of some file that is generated by the 3rd party battery?  I guess I'm talking about those scam USB drives on eBay that advertise 128 GB and shows up on your computer as 128 GB, but are actually like 2 Gb  when you actually try to use it.  Or is it the Battery Report that is just reading off of some old file?

I'd like to return the product  through Amazon within about 12 days instead of through the vendor if it's faulty or bad advertising.  Can someone please explain why there is a discrepancy in the values?  Thanks,

[Echo_Lake]

@mehwhatever

Welcome to HP Forums,

This is a great place to get support, find answers and tips,
Thank you for posting your query, I'll be more than glad to help you out 🙂

I see that you're looking for a information on the third party battery which is showing incorrect mAH capacity while performing the test from your HP notebook.

Note: HP Doesn't recommend any upgrade/downgrade of any hardware parts or software that is bundled with the product. It may affect the manufacturer's warranty and performance. You can change the configuration at your own risk

Also, the third-party batteries are not tested and tried with our product, So we cannot guarantee anything on it.

Hope this help!

If I have helped you resolve the issue, feel free to give me a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on "Accept as solution" from the drop-down menu on the upper right corner, thank you for posting in the HP Support Forum. Have a great day

[mehwhatever]

@Echo_Lake

Thank you for a response, but it was not helpful. My question was in regards to the discrepancy in the mWh values depending on WHICH source (software) you look at.  If this same discrepancy had occurred with the HP OEM battery, would you have a possible rationale? 

[Echo_Lake]

@mehwhatever

Thank you for posting back.

The battery in a notebook PC is designed to provide dependable power; however, all rechargeable batteries gradually lose their capacity to hold a charge.
Batteries made of different materials have different lifecycles. For instance, with moderate use, Li-Ion batteries are expected to deliver around 80% of their original capacity after 300 charge cycles or about one year of use. This loss in capacity (ageing) is normal and irreversible.

I’d like additional information in order to assists you better with notebook battery capacity.  

What is the product number of your device? Use this link to find it: HP Notebook PCs - How Do I Find My Product Name or Number?

(Ensure you do not share any of your personal information such as serial, phone number, email ID, etc...)

Keep me posted.