The StormCell 442 Series of battery backup pump systems from Liberty Pumps feature 12-volt backup sump pumps with professional-grade chargers, an energy-efficient DC pump for longer runtimes and optional NightEye wireless technology for remote monitoring of the pump system through a tablet or smartphone. The NightEye app is a free download and is compatible with Apple iOS and Android devices. 800/543-2550; www.libertypumps.com.