Gunvault sv500 unreliable - GunVault SpeedVault Digital Handgun Safe

I have two of these bedside. One will not accept the code. Tried a new battery and reprogrammed now will beep five times intermittently. It was fun looking for the key in the middle of the night to pull the battery out. Even tried the lithium battery and it started beeping hours later. They give five years on fire or burglary with an official report and one year for defects. Customer service said it was an odd problem and to use high quality alkaline batteries. I said the chemistry should not be an issue. I guess I wasted my money on this. Cannot be relied upon.