Asus N53SV - upgrading bios without battery

DISCLAIMER: I do not recommend doing this for obvious reasons. If your machine loses power midway through a BIOS update, you're likely left with a brick!

Firstly - ask yourself if you really need to apply a BIOS update? Why do you 'want' to? Is there actually something wrong with the machine fixed by the latest update?

1.Show system serial number on setup menu

2.Add New CPU function support

3.Update CPU microcode

4.Fix sometimes system can't boot after press power button.

5.Update EC firmware

I can see 4 being an irritation, but is it worth risking a completely dead system for?

If you still want to go ahead, try this at your own risk.

The download page for your machine lists the bios utility to use as WinFlash.

You can run this with a command line argument, usually /f or /forceit to bypass checks.

I have updated bios for a ASUS F75A (2012) without battery.

1) Download the new bios (for me X75A1AS.412) and copy it on USB key (FAT32).

2) Start and enter bios, then in bios menu : "Advanced" -> "Start Easy Flash"

3) When the system will display that you can not update the bios because there is no battery, on your keyboard you enter "risky"