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Old 02-09-2021 | 10:09 AM
  #13  
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mrreet2001
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Page 35 of the manual:
Firmware Upgrades via SD Card
  1. i Create a new directory in the available SD card: X:\Junsi\Upgrade ;
  2. ii Rename the firmware file to 406DUO.BIN, and copied to the new directory;
  3. iii Insert the SD card into the charger, and press the Knob, STATUS-2, STOP/START-2 at the same time and electrify,

    the charger will automatically upgrade the firmware, which takes about 20 seconds.
  4. iv After the upgrading is complete, the charger will reboot.
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