An uninterruptible power supply (UPS) is a big battery that kicks in when the power goes out. We will focus on testing smaller desktop models that give you enough power for a desktop PC and leave the whole-house models to other experts. If you need a UPS, buy the APC Back-UPS Pro 1500VA. It has a big enough battery to save your work and safely shut down without panicking. APC Back-UPS Pro 1500VA Pros LCD display Numerous outlets Small footprint Hot swappable batteries Cons No USB Port Large and in charge The APC Back-UPS Pro 1500 is a utilitarian device,…