Liberty Pumps 441A Battery Back-Up Sump Pump System w/ alarm - 12v
This battery back-up system with an alarm is a 12v battery-operated system that has the ability to work automatically even when the power stops working. It features an advanced 5-stage charging system that tests the battery and preserves the highest possible charge without burning the battery or self-discharging. The pump is only meant to be used as a temporary solution for pumping if the main sump pump is not working for some reason. This is not a sump water removal pump for normal use. The submersible pump has an automatic, mercury-free switch. This system comes complete with a 12v charger and an in-use alarm and light.