Help Upgrading BIOS on Dell Studio 14Z with Bad Battery or Charge Circuitry

[mikeymagnesium]

Hi Yall, I got this Dell 14z Studio 1440 and the Winphlash64 from Dell will not upgrade due to battery under 20% charge error. The battery will not charge due to motherboard or BIOS issue. Therefore, I need to upgrade the BIOS from A01. I have tried the switches /forceit and such as mentioned elsewhere, but it seems this version of Winphlash64 has phased out that switch option. I unpacked the Dell BIOS package and tried from DOS, but it says it doesn't run in DOS mode. I'm really stuck. Can anyone help with this? Thanks so much!