Flash All Bat — Xiaomi Link ((full))

Flashing a Xiaomi device using the flash_all.bat file is the standard method for installing a clean "Fastboot ROM" to unbrick a device, revert to stock software, or change regional firmware. Understanding the Scripts

Inside a Xiaomi Fastboot ROM folder, you will find three primary batch files, each serving a different purpose:

flash_all.bat: The most thorough option. It wipes all user data and internal storage before flashing the new system. flash all bat xiaomi link

flash_all_except_storage.bat: Updates the system files while preserving your internal "virtual SD card" files (photos, downloads), though it still wipes user apps and settings.

flash_all_lock.bat: Flashes the entire system, wipes all data, and relocks the bootloader. Flashing a Xiaomi device using the flash_all

Caution: Only use this if you are flashing the correct ROM for your specific region (e.g., Global ROM on a Global device) to avoid hard-bricking.

flash_all.bat script is a core file found within the official Xiaomi Fastboot ROM Best practices and safety checklist

packages. It is used to completely wipe a device and install a fresh factory image. Essential Requirements Unlocked Bootloader : This process will work if your device's bootloader is locked. Fastboot ROM : Ensure you download the version of the ROM (typically a file), not a "Recovery" ROM (typically a file). Use the Xiaomi Firmware Updater to find the correct version for your specific model. : Install the Xiaomi ADB and Fastboot drivers on your PC so it can recognize your phone in Fastboot mode. How to Use the Flash Script There are two primary ways to use the flash_all.bat Method 1: Using the Mi Flash Tool (Recommended) Extract the ROM : Unzip the downloaded file twice until you see a folder containing an folder and several Open Mi Flash : Launch the Official Mi Flash Tool to point it to the main extracted ROM folder (not the subfolder). Boot to Fastboot : Power off your phone, then hold Volume Down + Power until the Fastboot bunny logo appears. : Connect your phone to the PC, click in the tool, select at the bottom, and hit Method 2: Manual Flash (No tool required) Navigate to your extracted ROM folder. Double-click flash_all.bat while your phone is connected in Fastboot mode.

A command window will open and automatically run the fastboot commands to flash each partition. Comparison of Script Options flash_all.bat Wipes all data and installs the ROM. Leaves bootloader unlocked flash_all_except_storage.bat Updates the system but preserves your internal storage flash_all_lock.bat Wipes all data, installs the ROM, and locks the bootloader [!CAUTION] flash_all_lock.bat

if you are flashing a ROM from a different region (e.g., flashing a Global ROM on a Chinese model). This will brick your device. How to Flash Fastboot ROMs on Xiaomi devices? - addROM How to flash Fastboot ROMs on HyperOS? Vopmart.com How to Flash Fastboot ROMs on Xiaomi devices? - addROM

Best practices and safety checklist

  • Always use official files for battery/fuel-gauge firmware.
  • Keep a backup image of persist, vendor, and any BAT-related partitions before changes.
  • Avoid mixing images from different device variants.
  • If unsure, reflash the full stock ROM rather than selectively flashing unknown BAT files.
  • If device under warranty or critical, prefer authorized service for fuel-gauge firmware updates.

Device Detection & Compatibility

  • Detect via USB descriptors, ADB fastboot IDs, Qualcomm PID/VID, MediaTek preloader.
  • Verify firmware package matches device model and partition layout before writing.
  • If mismatch, mark device as incompatible and skip unless user overrides with explicit confirmation.

D. Custom ROMs / kernel mods

  • Ensure custom kernel matches the battery config from the ROM; mismatched DT overlays or kernel parameters can break battery readings. Often, flashing vendor from stock to match kernel fixes issues.
  • If using Magisk or modifications that touch persist/vendor, restore original blobs first.

Prerequisites (what you need)

  • A Windows or Linux PC with Xiaomi USB drivers installed (for MiFlash / fastboot).
  • USB cable and reliable power source.
  • Device-specific stock firmware (fastboot ROM) or official vendor BAT/fuel-gauge files.
  • Bootloader unlocked for many operations; some vendor partitions may require authorized flashing.
  • Knowledge of fastboot, adb, and MiFlash tools.
  • Full backup of userdata and relevant partitions (persist, vendor, product, efs where applicable).
  • Installer tools: MiFlash (Windows) or fastboot (platform-tools), and for deep cases, a Qualcomm Sahara/EDL tool or Xiaomi authorized flashing method for EDL mode.

What You Need

  • A Windows PC (10/11 recommended).
  • A Xiaomi USB cable (data sync capable).
  • Mi Flash Tool (Download from c.mi.com).
  • Fastboot ROM for your specific model (.tgz file from miuirom.org or official sources).
  • Unlocked Bootloader (Required for "Flash All").

3. Workflow Steps (User Perspective)

  1. Run flash_all.bat as Administrator.
  2. Select firmware file (.tgz or .fastboot folder).
  3. Choose flash mode: clean all, save user data, or flash only specific partitions.
  4. Script verifies:
    • Drivers installed
    • Device connected
    • Bootloader unlocked (if needed)
  5. Executes flash commands (e.g., fastboot flash for each partition).
  6. Displays success/failure and reboots device automatically.