Basement Watchdog 24EP6 Emergency Standby Battery Compatible with the Basement Watchdog Emergency (BWE) battery backup sump pump system or Basement Watchdog Combination primary and battery backup sump pump system (DFK961) Pumps intermittently for days on the Basement Watchdog Emergency (BWE) or Combination (DFK961) system Accommodates the Basement Watchdog fluid sensor to sound an alarm when distilled water is needed Shipped dry to remain fresh until activated Can be easily and safely filled with a 6 qt. battery fluid pack (sold separately Model # Z-PACK) 1 year warranty