The apc was making a clicking noise which it does when it's self checking itself for issues. But it was happening a lot more often which made me think that it might be the apc. I have replaced the battery in the apc before and I know that's not the issue here. The apc won't shut up when the battery is dead.
My unit was also an APC, and it also performs the same self-test (the clicking ya hear) when it loads the battery. The APC in question passed the battery multiple times the day I removed it, even though it was bulging so badly that it was pretty tightly wedged into the UPS. The inner seals were exposed on multiple sides of the battery casing and I was frankly amazed it wasn't yet giving off a sulfuric smell. It also resulted in stuff randomly powering off that was connected to the unit, which was the ONLY warning sign I had something was amiss.
The first APC I bought in 2002 was a much better UPS even though it cost less and had a lower VA rating than the newer one. As far as Cyberpower goes, I haven't yet had anything to report with mine but it's only a year old. I'll know better by year three... I don't expect it to be better than APC units to be honest.