The CyberPower PFC Sinewave CP1000PFCLCD has many of the features necessary for acting as a stable uninterruptible power supply (UPS) for modern PCs and Macs, including gaming systems and those used by creative professionals. This 600-watt capacity unit can keep a fairly high-end computer system with external drives and monitor running for the few minutes necessary for safe shutdown when maxed out. A more modest setup that draws just 300 watts could chug along for nearly 10 minutes, letting you bridge a short, but sustained outage.
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