Hammer-Head XR1602 Battery Power Pack for Remora® Portable Vacuum - This Battery Power Pack is for use with the Remora® Portable Vacuum. It is equipped with a Smart Switch™ that monitors the power that is delivered to the motor. The Smart Switch™ has two speed settings and an automatic shutoff after a minute when the the vacuum is running out of the water. It will also display a flashing red light if the motor is obstructed or a flashing blue and red light if it detects a short circuit in the wiring.