Raw 4.00 MB BIOS binary for Acer, with the name referencing both the V5-121 and the Aspire One 725, two models commonly built on the same platform. A .bin of this size usually matches a 4 MB (32 Mbit) SPI flash chip and is written directly with a hardware programmer. Read and keep the original contents before erasing the chip. Confirm the board number on the PCB and the chip capacity first, since an image that does not match the flash size will not fit or boot.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →