The Best Uninterruptible Power Supply (UPS)

Most people can get through a household power outage without much hassle—chances are, by the time you find the spare flashlight batteries and break out the board games, your lights and television will already be back on. But if you want to keep your home Wi-Fi network and some other key electronics up and running in the event of an outage, an uninterruptible power supply (UPS) might be a worthwhile investment. After spending 34 hours interviewing experts, considering more than 100 models under $250, and testing the top candidates, we found that the CyberPower CP900AVR is the best UPS for people who want to back up a few small electronics (such as a modem, router, PC, external hard drive, or game server) during a blackout lasting up to four hours.