Wd15 Firmware

Try these firmware:

Solves the "Undersized Power Adapter" boot error message when utilizing 130W or 180W Dell power supplies. wd15 firmware

If you have issues installing the update, check if your laptop has a pending BIOS update . I found that a stale BIOS version on my XPS 15 was actually blocking the dock firmware from flashing correctly. Try these firmware: Solves the "Undersized Power Adapter"