This APC BE425M Back-UPS battery backup power supply offers guaranteed power and surge protection for wireless networks, computers, and other small electronics in your home or business. Backup battery power supply is designed for use during outages and unsafe voltage fluctuations, and provides surge protector with battery backup in the event of damaging power surges and spikes. The APC Back-UPS series are the perfect battery backup for routers to keep you and your smart devices connected.