Battery backup trashed?

[90redtsi]

I have a battery backup for my PC and networking devices plugged in. Even with it plugged in to the wall and working fine. My entire battery backup will just drop power to everything and restart. while that happens other things on the same outlet line are still live. they do not lose power or anything. anyone have any thoughts to fix this. its random and no alerts ever unless I fully lose power then I get a beeping per normal operation and battery last long enough for me to turn off my pc. 
To add to it the outlet is rated 30amp for a window AC unit that was removed and replaced with a sectional unit on a different cable from the box. so the power draw couldnt be anything near tripping the pannel or outlet side of things.

[ki8aras]

maybe its a contact issue on the outlet

[90redtsi]

I will double check that with a new outlet to rule it out. thank you. 

[keskparane]

31 minutes ago, 90redtsi said:

battery last long enough for me to turn off my pc

This makes it sound to me like it only just lasts long enough. Is that the case? I'm wondering if you're drawing too much from the UPS?

[90redtsi]

No i mean the battery works for what i need it to. I'm sure it isn't 100% but not a battery issue. When plugged into the outlet shouldn't it just run from AC power?

[90redtsi]

UPDATE: I ended up contacting APC and was told my transformer inside the unit is old and wore out. I was told the best thing is to get a new unit in a whole. So i got a new unit. 0 issues now.