Protect and power your electronics during an electricity outage with this APC Back-UPS battery backup. The 9 outlets offer surge protection to defend against potential damage, while the internal battery delivers a steady source of power. An integrated USB port makes it easy to power up portable devices for emergency use. This APC Back-UPS battery backup boasts audible alarms, serving as an alert to possible issues. Battery backup offers a consistent power source. High output current -- up to 2.1 amps. 9 outlets provide flexible setup options. USB port charges portable electronics. ENERGY STAR certified — meets federal guidelines for energy efficiency. Energy efficient — designed to use less energy than alternative products, potentially helping you save money and reduce your carbon footprint. Helps save energy — designed to limit the energy used by other products, potentially helping you reduce your carbon footprint and save money.