It seems that there is some problem in your battery or your UPS is not able to perform cut out when main power is lost. If your UPS and battery are new I think you should definitely consult to the vendor from where you have purchased the UPS.
It seems that there is some problem in your battery or your UPS is not able to perform cut out when main power is lost. If your UPS and battery are new I think you should definitely consult to the vendor from where you have purchased the UPS.