For the most stable and secure performance, always use official resources from the TP-Link Support Page Release Notes
October 2023 (Updated for Legacy Support) Product Focus: TP-Link TL-WR840N (Middle East & Africa Variant) | Hardware Version: v6.20 tlwr840nme v620 firmware full
If the power cut out during the update, try a "Hard Reset" by holding the Reset button for 10 seconds. If that fails, you may need to use the TFTP recovery method. Final Verdict For the most stable and secure performance, always