Get $30 Discount On CyberPower Back Up System At Bestbuy.com. Safeguard the computers and more with this CyberPower 850 VA battery back-up system, which features surge protection to quickly divert power spikes. The Line Interactive topology regulates fluctuations without switching to battery power. The 1030-joule rating absorbs a high amount of energy to adequately protect the equipment and prolong the life of the unit. The 12 surge-protected outlets include 6 with battery backup and 4 widely spaced outlets to protect the equipment in the home office. The Data line protection halts power surges in the phone line. The HID-compliant USB port allows easy connectivity. The simulated sine wave output with pulse wave modulation generates a stepped, approximated sine wave for efficient power.