Flash the BIOS without removing the chip on a Dell Precision 5570

[Yousman]

I need to flash the BIOS without removing the chip on a Dell Precision 5570 laptop.
I've two questions:
1. The main BIOS seems to be GigaDevice GD25R512MEY (at the back of the motherboard). But there are two other Winbond W25Q80DV chips (One at the front, one at the back of the motherboard). What are these two? EC and/or Thunderbolt? Do they need to be flashed as well?
2. I can't locate the CMOS battery anywhere on the motherboard. Is it possible that the standard battery is being used as a CMOS battery as well?
Regards

[SMDFlea]

I need to flash the BIOS without removing the chip on a Dell Precision 5570 laptop.
I've two questions:
1. The main BIOS seems to be GigaDevice GD25R512MEY (at the back of the motherboard). But there are two other Winbond W25Q80DV chips (One at the front, one at the back of the motherboard). What are these two? EC and/or Thunderbolt? Do they need to be flashed as well?
2. I can't locate the CMOS battery anywhere on the motherboard. Is it possible that the standard battery is being used as a CMOS battery as well?
Regards

1. Leave the W25Q80DV chips alone. GD25R512MEY is the bios
2. If there is no CMOS battery yes the main battery powers the RTC .

[SMDFlea]

I need to flash the BIOS without removing the chip on a Dell Precision 5570 laptop.
I've two questions:
1. The main BIOS seems to be GigaDevice GD25R512MEY (at the back of the motherboard). But there are two other Winbond W25Q80DV chips (One at the front, one at the back of the motherboard). What are these two? EC and/or Thunderbolt? Do they need to be flashed as well?
2. I can't locate the CMOS battery anywhere on the motherboard. Is it possible that the standard battery is being used as a CMOS battery as well?
Regards

1. Leave the W25Q80DV chips alone. GD25R512MEY is the bios
2. If there is no CMOS battery yes the main battery powers the RTC .

[Yousman]

Thank you very much