In an aquarium with no flow, fish and corals begin to die in as little as 4 to 10 hours. The VorTech Battery Backup is reef tank insurance in an aluminum housing. By adding the VorTech Battery Backup, your tank is insulated from power interruptions. Backup Running Time: * MP10 minimum 72 hours * MP20 minimum 72 hours * MP40 minimum 36 hours * MP60 minimum 20 hours Product Features * Reef Tank Insurance in an aluminum housing. * Backup power for 30 or more hours on a VorTech Pump. * Can connect to another Battery Backup for two times the run time. * Comes with trickle charger so you`re always prepared. * Complete package comes with all the wiring cables needed. Product Benefits * Designed to power the EcoTech Marine VorTech Pump. * Knowing you are a responsible reef keeper. * Vacation better. Sleep better. Peace of mind. Specifications * 18 Amp-Hour 12-volt sealed battery. * Powder-coated white aluminum housing. * Dimensions (L x W x H): 9" x 7" x 3.25"