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The Basement Watchdog backup sump pump battery is available for purchase today.

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Basement Watchdog Backup Sump Pump Battery

(Based on expert analysis, manufacturer ratings and customer reviews)
3.7 out of 53.7 out of 53.7 out of 53.7 out of 53.7 out of 5
9 Reviews
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  • Features
  • Specs
  • 8
    Q&A 
  • 9
    Reviews
  • Articles
  • Shipping
  • Accessories

Need Help? Call Our Sump Pump Experts.
Back-Up Standby Battery
Designed to be drained and recharged (ships dry)
Lasts longer and performs better than automotive batteries

Unique Construction
Runs sump pumps longer (more hours per charge)
Extends battery life (normally 5-7 years)

Extended Run Time
Runs Special (BWSP) and Big Dog (BWD12120C) for 7.5 hours
Runs Emergency (BWE) Pump for 12 hours

Special Cap
Holds the battery fluid sensor at the correct height
Helps reduce risk of failure (80% of failures due to low water)

WILL NOT WORK WITHOUT BATTERY ACID (SOLD SEPARATELY)

Reserve Capacity: 182 min. @ 25 Amps


Model
Model Number:30HDC140S
UPC:717301301407
Manufacturer:Basement Watchdog
Overview
Weight:45 Lbs.
Dimensions:13"L x 6 3/4"W x 10"H
Consumer Warranty:1 Year
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  8 Questions
Q: What is the amp-hour rating of the Watchdog battery Model # 30HDC140S battery?

by Dean from Michigan on October 06, 2014

A: The Basement Watchdog Battery model 30HDC140S is not rated in amp hours. It is rated in Reserve Capacity at 182 min. @ 25 Amps. If you would compare this to a marine battery it would be around 700 cold cranking amps (CCA).
by Jim, Product Expert
Q: I don't have a yellow cap for the sensor on my old battery and there was no special cap with the new battery. Do I use one of the regular black caps?
by Karen R from Ohio on February 19, 2014

A: Please call Basement Watchdog tech support at 800-991-0466 and they will assist you in getting a replacement cap.
by Jim, Product Expert
Q: Is it correct that Acid is sold separately? If so, how much would it be ? Should I order both the battery and acid in the same order?
by Huy from New Jersey on November 18, 2012

A: We offer the this battery two ways. For convenience, we offer the KIT which also includes the acid. If you are looking to save a few bucks, you can order the BATTERY ONLY and purchase the acid locally. The battery acid usually be found at your local auto or big box store for about $20.
by Jim, Product Expert
Q: Does this hook up to any pump?
by Todd from Pennsylvania on October 25, 2012

A: The Basement Watchdog model 30HDC140S Is designed for use with the Basement Watchdog line of battery backup sump pump systems, including models BWE, BWSP & BWD12120C. This battery can also be used for just about any other battery backup sump system requiring a 12 volt deep cycle battery.
by Jim, Product Expert
Q: I would like to purchase your battery and know that it needs acid. How can I purchase the acid for this battery?
by Janet Terrana from New York on August 28, 2011

A: You should be able to purchase it locally at any auto parts or big box store for around $20. You do want to look for 6 quarts of 1.265 specific gravity battery acid.
by Jim, Product Expert
Q: How much battery acid does the Model 30 Watchdog Battery take?
Does it use "electrolyte" battery acid that can be found at industrial supply stores? Thanks.

by Erick from Michigan on June 07, 2011

A: The Basement Watchdog model 30HDC140S battery will use 6 quarts of 1.265 specific gravity battery acid. You can normally find he acid at any big box store, auto parts store or anywhere that sells batteries. Please note that the battery will accept all 6 quarts. If you use all the acid, distributed evenly across the cells and the cells are still not full, let the battery sit for about 10-20 minutes and then fill with distilled water.
by Jim, Product Expert
Q: Light on the panel is on indicate either Terminal is corroded or Defective Battery. please tell me where I can find the terminal and how to clean it, thanks. My battery model is 30HDC140S
by Ken from Illinois on February 24, 2011

A: The terminals are the metal posts located on the top of the , where the wire connect to it. You'll have to unplug the unit and disconnect the battery

You can use baking soda, water and a tooth brush to clean the terminal. There's also a battery terminal brush tool you can buy at most auto parts stores. Steel Wool works too.
by Jim, Product Expert
Q: If I buy a Basement Watchdog pump do I need a Basement Watchdog battery?
by Karen from Illinois on January 03, 2011

A: You can use any deep cycle marine battery, as long as it is not maintenance-free. However, there are several advantages to using a Basement Watchdog battery. The Watchdog battery accommodates the system’s fluid sensor which will sound an alarm when the battery needs water…a very important feature, since a dry battery will not perform. In addition, Basement Watchdog batteries run longer per charge, and last years longer. A typical marine battery will last 2-4 years, while the Watchdog battery will last approximately 5-7 years. Basement Watchdog batteries are shipped dry (without acid) so they stay fresh on the shelf indefinitely, while wet batteries have a short shelf life.


by Jim, Product Expert
Basement Watchdog 30HDC140S Reviews & Ratings
Write Review
Overall Rating
Features
4/5
Quality
4/5
Performance
4/5
Value
4/5
Overall
3.7 out of 53.7 out of 53.7 out of 53.7 out of 53.7 out of 5
Pros
Easy To Use (1)
Cons
Durability (1)
Unreliable (1)
Heavy (1)
Low Quality (1)
9 Reviews  Sort by 
 
Carasdude
Most Helpful Critical Review
REVIEWED
FEB.
18
2014
2 out of 52 out of 52 out of 52 out of 52 out of 5
Big Dollars, Low Value!
I purchased the Watchdog system due to power outages in our area and wanted to have a 2nd sump pump to backup the 1st. About every 45 days it required water and the usage was in my opinion too much. Little over the 1 year warranty mark, it quit charging and the alarms were going. The connections from the charger to the battery had completely disintegrated! So I call Watchdog and they send another connector ( and it was just as cheesy as the original ) and I hooked it up. Still, no charge. The... more
Pros: Easy To Use
Cons: Low Quality, Heavy, Unreliable, Durability
Carasdude Does Not Recommend This Product
Manufacturer Response
Brand Rep
Carasdude,
We are very sorry about your experience with the battery. We would like you to know that we do recommend that the battery be tested professionally before replacing. As for the connectors, corrosion is a natural occurrence in moist conditions. If the connectors were replaced and you are still having the same problems with a good battery, the wiring for the connections should be examined to confirm that no corrosion is present. This may be the cause as to why the system is alerting you that the battery is bad if it is not able to read the battery correctly due to corrosion. Please give us a call directly, we would love to help you. You can reach us at 800-991-0466 Ext. 3 for a technical support assistant.
more
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30
Bill
Shaumburg, IL
REVIEWED
SEP.
26
2011
1 out of 51 out of 51 out of 51 out of 51 out of 5
Battery Is Garbage
This unit and battery are complete garbage. The controller failed during a power outage. Lucky for us we were home to run our generator or we would have had a flood. The repair cost me $70 (ouch!) also the battery failed 13 months after installation. Save your money and buy another brand!
Manufacturer Response
Brand Rep
Bill,
We are sorry that you are not happy with this product. We would love it if you reached out to us for further assistance, since we would not charge a repair cost in your situation. It sounds like your unit was under warranty. Also we would like to know if you had the battery tested before replacing since we do not recommend that the battery is replaced until it is professionally tested by load.
more
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40
Terry
Purchased from Sump Pumps Direct
Purchased 9/25/12
Total Reviews
2 Reviews
REVIEWED
NOV.
06
2012
5 out of 55 out of 55 out of 55 out of 55 out of 5
Indirect Sandy Power Outage
I just got this system installed a week ago Monday, October 29, 2012 (actually 2:15 AM October 30) I just completed the install and got it plugged in no more than 10 seconds before the power went out. It immediately went to battery operation and worked fine.

I was surprised that it worked showing the battery as fully charged, as I had just put the acid in the battery about 15 minutes before completing the hook up. I purchased the acid from a big box store which was the least expensive... more
Manufacturer Response
Brand Rep
Terry,
Thank you so much for your recommendations and trust in our company and product. We are happy that we were able to assist you immediately when you most needed it. We know that you will be satisfied with the future use of the product.
more
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20
Jon Hoch, Founder
Bolingbrook, IL
Total Reviews
72 Reviews
Total Helpful Votes
127 Helpful Votes
REVIEWED
JUN.
06
2008
5 out of 55 out of 55 out of 55 out of 55 out of 5
Designed For Sump Pumps
A battery backup sump pump is only as good as its battery.

If the battery fails during a power outage, the system is useless. In fact, nearly 80 percent of failures are due to dead batteries.

The entire Basement Watchdog system was designed around its unique battery.

Maintenance-free batteries sound appealing, but they lose power with age. If it sits in a warehouse or store shelf too long, the battery will be weak or dead when you buy it.

The Basement Watchdog battery, however,... more
Was this review helpful?
42
Matthew
Lutherville, MD
Total Reviews
2 Reviews
REVIEWED
SEP.
25
2011
4 out of 54 out of 54 out of 54 out of 54 out of 5
Watch The Installation Video
I purchased the Basement Watchdog BW4000 (primary and backup combo) and installed it myself. The installation video is very helpful (aside from the really annoying music), but chances are your installation will not go as smoothly. I have a radon vent fit into my sump and that complicated installation (not accounted for in the installation video). If you have basic plumbing skills you'll be ok, but even if you don't have a radon vent in your sump, don't kid yourself - installation will take... more
Manufacturer Response
Brand Rep
Matthew,
Thank you for your review and your recommendations to watch the videos that we provide. If anyone reading this is wanting to view this, the direct link is posted below.
Installation Videos
more
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10
Mark
Chalfont, PA
Purchased from Sump Pumps Direct
Purchased 8/24/11
Total Reviews
2 Reviews
REVIEWED
SEP.
14
2011
5 out of 55 out of 55 out of 55 out of 55 out of 5
Highly Recommend
I just installed the Basement Watchdog sump pump unit prior to hurricane Irene and thankfully I only had a small amount of water in my sump pump well.

The following week my area in PA got another 7" of rain from the tropical storm Lee and again the pump only turned on a few times to empty the sump pump well.

I am not able to provide any long term use report, but I am very happy with this unit. It is well made and it was easy to install and I am glad that I got the battery backup... more
Manufacturer Response
Brand Rep
Mark,
Thank you so much for your review. Also thank you for highlighting the fact that we stand behind our customers as well as behind our products. We are always willing and ready to help with whatever we can. We appreciate your feedback.
more
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10
Abdullah
Planefield, NJ
REVIEWED
OCT.
09
2011
4 out of 54 out of 54 out of 54 out of 54 out of 5
Basement Watchdog 7.5 Battery
Item received on time as promised. Wish that Sump Pumps Direct had actually packaged before shipping rather than simply sending in the retail box. It got a little banged up in transit

Also, wish that Basement Watchdog would offer a maintenance free battery. Who wants to deal with battery acid as well as disposing the unused remaining. Yuck

Overall a good experience with Sump Pumps Direct.
Manufacturer Response
Brand Rep
Abdullah,
We thank you for your review. We will definitely take your suggestions into consideration.
more
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00
Abdullah
Planefield, NJ
REVIEWED
OCT.
09
2011
4 out of 54 out of 54 out of 54 out of 54 out of 5
Basement Watchdog 7.5 Battery
Item received on time as promised. Wish that Sump Pumps Direct had actually packaged before shipping rather than simply sending in the retail box. It got a little banged up in transit

Also, wish that Basement Watchdog would offer a maintenance free battery. Who wants to deal with battery acid as well as disposing the unused remaining. Yuck

Overall a good experience with Sump Pumps Direct.
Manufacturer Response
Brand Rep
Abdullah,
Thank you for your review. We will definitely take your suggestion into consideration.
more
Was this review helpful?
00
Paul Guardino
Howard Beach, NY
REVIEWED
SEP.
04
2010
3 out of 53 out of 53 out of 53 out of 53 out of 5
A Life Saver
When the floods came this summer, this pump saved me from thousands of dollars of clean up bills!!!

It is truly a life saver.
Manufacturer Response
Brand Rep
Paul,
We are glad that we were able to assist you in your time of need. We appreciate your feedback.
more
Was this review helpful?
00
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