Designed for electronics in your home or office, such as computers and related equipment, network devices (modem/router), POS devices, CCTV circuits, televisions, video game consoles, and more, the Battery Back-UPS Pro BX850M from APC helps protect against surges, spikes, lightning, and outages. In the case of a power outage, it can provide up to 2 minutes of runtime at max load, 8.9 minutes at half load, and 167 minutes at 10W. It also provides an output capacity of 850 VA / 510W, eight total NEMA5-15R outlets (four battery backup & surge and four surge-only), an input voltage of 120 VAC at 60 Hz ± 3 Hz using its 6' cord with a NEMA5-15 plug, a surge energy rating of 1103 joules, and 1Gb of dataline protection. Its sealed, lead-acid battery is maintenance-free and can be replaced using an RBC17 replacement battery. The BX850M outputs 98 to 139 VAC at 60 Hz ± 1 Hz (on utility) and 115 VAC ± 8% at 60 Hz ± 1 Hz (on battery).