![]() ![]() That happens within 5–12 milliseconds, but the computer still sees some power fluctuations. Standby UPS: This simple type of UPS, also called an offline UPS, monitors the incoming power, and if it rises or falls beyond predetermined levels, it switches to using battery power.The names that different manufacturers use vary slightly, but here are the differences: There are three types of UPS: standby, line interactive, and double conversion. And by having the UPS filter out power spikes and drops, your Mac and peripherals will last longer. When your gear is plugged into a UPS, you get some time to save your work and shut down gracefully, ensuring that you don’t lose data or flirt with drive corruption. Smaller power surges and brownouts may not cause the Mac to shut down, but they put stress on electronic components that can cause a shorter overall lifespan. You’ll lose all unsaved work and, depending on what was happening when the power went out, your drive might be corrupted. How does a UPS help?įor desktop Macs, a power failure means an immediate and ungraceful shutdown. This happens so quickly that your Mac never even notices. If the normal power fails, or surges or falls below a certain threshold, the UPS notices and switches the power source to its internal battery. It then plugs into a wall outlet and monitors the incoming power. Put simply, a UPS is a big battery into which you plug your Mac and other peripherals. That’s especially helpful as we head into the summer thunderstorm and fall hurricane season. Particularly for those using desktop Macs or external hard drives, a UPS is essential because it protects your work-and your devices-against surges, brownouts, and outright power failures. One thing that many have overlooked, however, is the need for a reliable uninterruptible power supply (UPS). With so many people working from home, lots of attention has been dedicated to making sure everyone has a functional computer, a reasonably ergonomic workspace, and a decent videoconferencing setup.
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