Smart APC SURT1000xli UPS not charging a ''totally discharged battery''

[Anonymous user]

in my firm, we are using APC ups, but in my particular section we encountered with a problem that my APC ups(smart APS SURT1000xli) is not charging its battery, once battery get fully discharged, otherwise its charging perfectly.

I'm using APC, SURT1000xli, UPS   with serial number,   (870-7321-A REV3 TSP)

battery inside are four in number(12V each), Kung LONG batteries and battery specifications are,

WP7-12(28W)

12V 7Ah, 28W/cell/15min

Each of the battery is giving 10-10.5volts reading(on voltmeter).

we have been using this UPS along with this battery from last 1 year. 

Another problem we encountered with is, that when we plug in power with UPS, it start giving a continous loud beep! how to fix this problem as well!
thanx for ur concern, waiting for ur responce!

[Anonymous user · Accepted solution]

Por lo que leo, no hay respuestas por parte de la empresa APC. es un problema comun y no se hacen cargo de dar soluciones a los clientes