X20 - can you update BIOS with a dead battery?

[g8tzl]

I know with earlier Thinkpads that you require a good battery..although there are workarounds.

Can you update X20 BIOS with a dead battery WITHOUT workarounds?

If NO, will Boot disk trick work with X20?

Thanks

[RealBlackStuff]

On page 37 HMM you find the layout for the battery connectors.
Use any working battery from another Thinkpad, find its pin-layout and connect just the positive and negative poles to the battery-slot in your laptop, using loose pieces of wire.