Basement Watchdog 30HDC140S Backup Sump Pump Battery

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Designed to be drained and recharged. Lasts longer and performs better than automotive batteries. Runs Special (BWSP) and Big Dog (BWD12120C) for 7.5 hours. Runs Emergency (BWE) Pump for 12 hours.
SKU: 40641333
MFG: 30HDC140S
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Basement Watchdog batteries are standby batteries. They are made to be drained and recharged, and they will last longer and perform better than automotive or deep cycle batteries in a backup application. The Basement Watchdog sump pump systems have a special battery cap which holds the battery fluid sensor at the correct height to measure the liquid level in the battery. This sensor can be used with Basement Watchdog Batteries, but not with other batteries. It is important to keep batteries properly filled. About 80% of battery failures are due to low fluid levels.

Basement Watchdog batteries have a unique construction that enables them to:

Run our sump pumps longer...for more hours per charge
Remain viable for more years...normally five to seven years
Accommodate the battery fluid sensor


  • 12 volt for "Basement Watchdog Special" back-up pump system
  • Will run the Basement Watchdog Special and A/C-D/C Sump Pump Systems for 7.5 hours continuously which is days of intermittent use
  • Will run the Emergency Sump Pump System for 12 hours continuously
  • 5-7 years life
  • Boxed.

Do not use a maintenance-free or sealed battery with Basement Watchdog products.


MFR: 30HDC140S
SKU: 40641333
UPC: 717301301407
Brand: Basement Watchdog
Weight: 38.0 lb
Attachments: Manuals,


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