I wish I had an apex. Gonna save over the summer for it. What do you mean cyber power 1500? That a PC?
As per the other posts the CyberPower 1500 is a 1500VA battery backup, or UPS. Not badly priced, has good reviews and is a nice neat low profile unit. As said by others it is only a short term backup, so if you expect long outages, a generator or a few deep cycle batteries are good options, either instead or as well.