PANews reported on March 21 that SlowMist Yuxian forwarded a security case about the use of hardware wallets on the X platform: "A user stored BTC in a hardware wallet and thought it was safe. After a few years, he took it out and found that the battery was swollen and it could not be used. He found a wallet of the same model and went to Huaqiangbei to change the battery. As a result, he opened it and found that the wallet had been initialized and there was no backup, so it was lost forever. Remind everyone that you must make a backup after using a hardware wallet. If you need to repair the hardware wallet, you must find a professional hardware team." Yuxian commented on this: "After a few years, the battery is swollen and it can't be used. The wallet has been initialized? Which hardware wallet, let's avoid the pit... If there is a mnemonic backup, it can be tolerated... If there is no backup, it's really XX..."