[REQUEST] Custom BIOS install for Inspiron 15R that doesn't require connected battery

[Itiel]

Hi,

I have an old Dell Inspiron 15R 5537 for which I'd like to update the BIOS, but the installation file won't let me as no battery is detected (a battery is connected but dead).
The bios download file is https://dl.dell.com/FOLDER05842977M/1/In...37_A12.exe
I found some docs mentioning using the /forceit parameter, but it doesn't work (and I verified I did it right by inputing a random parameter, for which I get "Invalid WinFlash parameters error", which makes sense).
I'd like a custom install file that won't require a working battery. Of course, I'm aware of the consequences.

(btw, I tried doing that from DOS- apparently there's no way to do it from there; I tried doing it from the BIOS setup or from the boot menu option to flash the BIOS from there but surprisingly the option to update the BIOS is missing. And I've check EVERYWHERE.)

Thanks!