PCDVD數位科技討論區 - 瀏覽單個文章

引用:

作者substar999

https://www.cyberpowersystems.com/faqs/my-unit-is-beeping-twice-every-15-45-seconds-what-is-happening/
你也可以看一下手冊說明
https://www.cyberpowersystems.com/capacity-va/625-va/

感謝...
Rapidly beeping: This is usually an indicator that your CyberPower product’s battery is almost out of charge.

看來應該就是電池掛了..., 謝謝.