Safes with electronic locks typically have (backup) keys too, which you'd need to hide or put in another safe, in case the battery dies.
If you write down your master password and put it in a safe you own you can get in that safe wether by code, key, or destructive entry.
Safes with electronic locks typically have (backup) keys too, which you'd need to hide or put in another safe, in case the battery dies.