Wet Cell Batteries

Basement Watchdog Wet CELL STANDBY Battery Compatibility:


Big Standby Battery

System Compatibility:

  • The Basement Watchdog Big Standby Battery is compatible with all versions of Basement Watchdog Combo or Backup sump pump systems


Emergency Standby Battery

System Compatibility:

Longer Runtime of Basement Watchdog Batteries

Longer Run Times

The Basement Watchdog batteries are designed in conjunction with our sump pump systems making them the perfect power source for your pumping needs. This allows your backup pump to run continuously for hours or intermittently for days to keep your basement dry.

Unique Construction of Basement Watchdog Batteries

Unique Construction

The standby construction of The Basement Watchdog Big Standby Sump Pump Battery (Model 30HDC140S) allows it to last longer and stay viable for years. Its design and construction ensure the battery is kept at peak charge without having to be discharged and recharged to maintain its health.

Basement Watchdog Batteries Are Made to Power Pumps

Made to Power Pumps

Both our wet-cell and maintenance-free Basement Watchdog batteries are designed to power sump pumps, which means they last longer and perform better than standard automotive or deep-cycle batteries.

Basement Watchdog Batteries Accommodate Exclusive Fluid Sensor

Exclusive Fluid Sensor

Every Basement Watchdog wet-cell battery accommodates our exclusive fluid sensor included with all Basement Watchdog backup and combination sump pump systems. This feature will alert you visually and audibly when battery maintenance is required. When using a Basement Watchdog CONNECT module you will receive texts, emails or in-app notifications regarding needed maintenance.

Basement Watchdog Batteries Are Shipped Fresh for Longer Shelf Life

Longer Shelf Life

Our batteries are shipped vacuum sealed for freshness, which translates to a longer shelf life for the battery.

Watchdog Watchdog: Watching Out for You for 3  Years

30+ Years Protecting Basements

The Basement Watchdog has been protecting homes for over 30 years and continues to be a market leader. We build the most dependable, user-friendly pumps in the industry using intelligent design, premium components, and quality manufacturing practices that include thoroughly testing every single unit.

Big Standby Battery
Big Dog Connect 50 hours Not recommended
Special Connect 60 hours Not recommended
Emergency 100 hours 50 hours
Big Combo 60 hours Not recommended
Combo 100 hours 50 hours
Height 10 inches 10 inches
Width 13 inches 10.125 inches
Depth 6.75 inches 6.5 inches
Weight 50 lbs. 21 lbs.
Voltage 12 VDC 12 VDC

* Based on a 10% duty cycle. Run times may vary based on inflow of water.