Standby Batteries

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Maintenance Free AGM Battery

Model BW-27AGM

FEATURES AND BENEFITS:

No need to add battery fluid or distilled water
Runs our backup sump pump intermittently for days
Lasts longer in standby operation
Purchase a Basement Watchdog AGM battery with a Basement Watchdog backup or combo system** and receive a FREE 1-year extended warranty on both

** The Big Dog, Special, Big Combo systems that include the Remote Terminal are compatible with the Basement Watchdog Maintenance Free/AGM Battery

PDF_download_icon Download: Maintenance Free AGM Battery Brochure

Where to Buy

Features Quick Overview

No need to add fluid

Last longer

Standby batteries

Extended Warranty with BW system

High reserve capacity

1-Year Limited Warranty

Features

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

The standby construction of The Basement Watchdog Maintenance Free (AGM) Sump Pump Battery (Model BW27AGM) 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.

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 AGM Batteries Are Maintenance Free

No Maintenance Required

If you are looking for a maintenance-free option, The Basement Watchdog AGM battery is your solution. No battery fluid to add, no water every 6 months—just connect the system and you are ready to go. All current Basement Watchdog Battery Backup and Combination systems are designed to accommodate the maintenance-free AGM battery.

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.

Additional Info

EXTENDED WARRANTY

Extended_warranty Purchase a Basement Watchdog Maintenance Free/AGM Battery with a Basement Watchdog Backup or Combination System and receive an additional 1 year extended warranty on both the battery and system at no additional charge.

EXTENDED RUN TIME

The Basement Watchdog Parallel Jumper Cable allows for extended sump pump run time by connecting multiple Basement Watchdog Standby batteries to the Basement Watchdog backup sump pump system.

Cable is easy to install and is wired in parallel (positive-to-positive and negative-to-negative)
Gives you added protection against flooding when your main pump fails, or if the power goes out
The batteries should be of similar age, capacity and type
Connecting an old and new battery together will not allow for proper charging

System Compatibility with Parallel Jumper Cables:

Big Dog CONNECT (Model No. BWD12-120C)
Special CONNECT (Model No. BWSP)
Big Combo (Model No. BW4000)

Comparison

	Big Standby Battery	Emergency Standby Battery	Maintenance Free/ AGM Battery**
BATTERY BACKUP SYSTEM RUN TIME*
Big Dog Connect	50 hours	Not recommended	40 hours
Special Connect	60 hours	Not recommended	48 hours
Emergency	100 hours	50 hours	80 hours
COMBO SYSTEM RUN TIME*
Big Combo	60 hours	Not recommended	48 hours
Combo	100 hours	50 hours	80 hours
BATTERY DIMENSIONS
Height	10 inches	10 inches	9 inches
Width	13 inches	10.125 inches	10.25 inches
Depth	6.75 inches	6.5 inches	6.5 inches
Weight	37 lbs.	21 lbs.	50 lbs.
Voltage	12 VDC	12 VDC	12 VDC

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

** Older versions, purchased before 2014 of the Basement Watchdog Special, Basement Watchdog Big Dog and Basement Watchdog Big Combo systems that include the Remote Terminal are compatible with the Basement Watchdog Maintenance Free/AGM Battery.

Using a maintenance free battery with an older non-compatible system may cause false alarms. Please call us at (800) 991-0466 opt. 3 for questions about compatibility.

Where To Buy

If at any time you have a question about Basement Watchdog or what you see on this site please e-mail us at mail@glentronics.com or call us toll free at 1-800-991-0466. Once you purchase and install a Basement Watchdog system you will be able to sit back, relax, and feel confident that your basement will remain dry.

Standby Batteries

Maintenance Free AGM Battery

Features Quick Overview

Manuals

installation videos

FAQs

Features

Longer Run Times

Unique Construction

Made to Power Pumps

No Maintenance Required

Longer Shelf Life

30 Years Protecting Basements

Additional Info

EXTENDED WARRANTY

EXTENDED RUN TIME

System Compatibility with Parallel Jumper Cables:

Comparison

Big Standby Battery

Emergency Standby Battery

Maintenance Free/ AGM Battery**

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Basement Watchdog Special CONNECT

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Big Wet Cell Battery

Emergency Wet Cell Battery

Basement Watchdog Parallel Jumper Cable

Where To Buy

Emergency Standby
Battery

Maintenance Free/
AGM Battery**