bios update

[15s_Eq]

I recently updated my HP 15s bios and now my battery charges from zero to hundred in one hour from 2 hours 30 mins
and discharges from 100 to <30% in less than an hour on average use from 10 hours. the saddest part is that it shuts down abruptly without warning and haven't seen it go below 29% since. it just shuts down. Now i have to keep the power source connected. Any ideas please? 
I cannot revert the changes made after the update and now am just heart broken.

[Bill_To]

Greetings @15s_Eq 

Welcome to the HP Forum.

It is possible the battery problem is coincidental. PCs are complex beasts.

It sounds like you tried to rollback the current BIOS to a previous version. Some HP PCs can't do this within Windows.

One thing you could try is to make a HP USB BIOS recovery stick. You need to download the correct, previous BIOS update for your specific HP PC.

Run the BIOS update on your PC or a second PC if your PC's BIOS is corrupted. Then select the USB recovery drive option. Follow prompts to create a HP USB BIOS recovery stick. You would need a blank USB stick to do this.

Doing the update this way, if it works, should bypass the EFI system partition roadblock.

You will have to immediately reinstall Windows after flashing the BIOS. Back up data before doing anything. Or edit the EFI system partition before you flash the BIOS to remove the current HP BIOS: .bin and .sig files. These files will reinstall the latest BIOS version again.

Insert the USB stick in your PC when the PC is off. 

Press and hold down the "Windows Key" and the "B" key at the same time. Now simultaneously press and hold the power button for 2 to 3 seconds. Then only release on the power button.

The BIOS recovery should start.

Or a local PC Tech might be able to flash your PC's current BIOS version to a previous version outside of the operating system if you cannot get this done.

The Tech would need a previous BIOS version. The Tech would have to delete the current BIOS: .bin and .sig files located in the system disk EFI system partition. Or a new Windows install would have to be done.

Regards

[15s_Eq]

By coincidental do you mean that the battery might actually be failing?
i happen to run a cmd battery report and it seems to be deteriorating

 and running the battery tests in the bios also gives the primary battery result as weak
this change happened after the update 

 this was on 26th when i updated the bios (before)

this was after
and you can see its deteriorating from 27193 to 827mWh in less than one hr of use

[Bill_To]

Greetings @15s_Eq 

Thanks for the additional info.

It does look like the battery is losing charge quickly.

This symptom could be an unintended bug in the new BIOS update or the battery is coincidentally failing.

You would have to either: try a different, known good battery, or try to rollback the BIOS to the previous version.

Regards