Backup Sump Pump Battery Buying Guide

Backup Sump Pump Battery

The most vital gadget in your basement is a Battery Backup Sump Pump system. This is generally used to supplement primary pumps to provide additional protection from water damage in case of power outage.  It is essential to purchase the sump pump backup system that is reliable and durable. So, let’s discuss some major factors about how to choose battery for sump pump backup system so that it functions smoothly for you.

Battery Type

The two most usual sorts of batteries available are Deep Cycle Marine Batteries and AGM Batteries. Profound Cycle Marine Batteries are fundamentally the same as what you would discover in the engine of more seasoned vehicles. They require constant keeping up by checking the water. AGM Batteries are the most recent innovation and don’t need including water. What’s more, the new age of AGM Batteries has about a half longer run time for their size and over that they should last five to seven years before substitution.

Pump Construction

It is completely straightforward. You have two options to either have a plastic one or cast iron. Would you like to drive a plastic vehicle? I’m not getting behind that wheel. Hence the same runs with the sump. A solid, cast iron siphon is an excellent decision.

Pump Capacity/Output

If all you required was to pick a solid metal sump with an AGM battery, it is all eventually simple. You additionally need to get the correct size pump! If it is pouring down like there’s no tomorrow outside and the power goes out, you need to ensure your reinforcement siphon can pump an identical measure of water as the essential siphon. Most essential pumps have a yield of 35 to 60 gallons for every moment (2100 to 3600 gallons for each hour). Ensure you get a reinforcement siphon that meets or surpasses this figure.


There are two standard sorts of reinforcement siphons such as AC/DC siphons and only DC siphons. AC /DC siphons are favored because they can work off your divider current or battery.  Hence the pumps cannot work individually off the divider current, so it will just keep going as long as the battery allows. Therefore, just DC shoes are more affordable.

Where to Purchase

Last and most important of all you should know that from where you will be purchasing the product. They need to be reasonable with their production rates and offer reliability and long-lasting durability in it.

Here we will be top best  batteries for sump pump backup system for you to purchase without any hassle:

Wayne WSB 1275 75Ah AGM Sealed Lead Acid Battery

The WSB1275 75Ah AGM battery from Wayne is pre-charged and ready to utilize. It is a sealed lead acid battery made with conveying handles for accommodation, and it is perfect with Wayne reinforcement items.

Important Features:

  • It has an output of 12 Volts, 75-ampere hour.
  • The battery is pre-charged.
  • Ready to use item
  • It is designed with conveying handles.
  • It is compatible with any Wayne’s battery reinforcement system.

Wayne WSB1275 comes completely charged and prepared to utilize as giving a yield of 12 volts and 75 amperes hour. It is a solid unit that can be used for a ton of use scenarios. It has a highlighting fixed holder and planned with conveying handles as this model is protected to use inside. This model is likewise impeccably good with all battery reinforcement items fabricated by Wayne.


  • Valve checks are peaceful
  • It is durable.
  • It is powerful
  • It is rust and consumption free
  • It is sealed lead acid battery so no acid handling as such
  • It has a warranty of 1 year


  • It is costly.
  • Backup battery has a short life.

MK Deep Cycle Gel Cell 12 Volt Battery for Backup Sump Pump

It is made of solid cast iron and has features like a drifting switch that is particularly essential for programmed activities. It is highlighted well with two quantities of check valves that are of substance. This model can be ideal for the sump pump bowls that have a distance of 15 inches across. It has a warranty of 5 years. Lastly, the model has been structured in such a way that it is compact and robust.

The model accompanies all such requisite and essential features that can be accommodating to shield your home from substantial floods. Additionally, when it is used of 75 amp hour batteries as it can perform well and persistently withstanding when the power is off. Speedy establishment and that too in a simple way, its bright highlights, and many other distinguished features make this model an ideal one for your home for protection from the flood.


  • It is easy to deal with.
  • It is easy to collect.
  • It has an observing framework
  • Self-sealing vent system protects from leakage of fluids


  • Some beginners will be finding it difficult in handling productivity functioning.

Mighty Max Battery 12V 75Ah SLA Battery for Wayne ESP25 Back-Up Pump

Mighty Max Battery is sealed lead acid (SLA) rechargeable maintenance free battery. Dimensions of this battery is 10.24 x 6.61x 8.27 inches. The battery is factory activated so no adding water required. Due to advanced design it works right out of the box and requires zero maintenance, zero adding of fluids compared to a flooded wet cell battery. It works with Wayne ESP15,ESP25 and Zoeller backup pump kit.


  • Maintenance free
  • Powerful battery and a good price
  • It comes pre-charged


  • No wire harness or mounting accessories included
  • Not designed for high initial current draw

Basement Watchdog 30 HDC140S Backup Sump Pump Battery

Basement Watchdog 30 HDC140S battery

It is compatible with any basement watchdog battery backup sump pump system. It is capable of pumping intermittently for many days to protect your basement from flood. Basement Watchdog also contains an emergency battery, but this battery will give you much longer runtime as compared to that.

Basement watchdog has the option of sensing fluid level, but some batteries do not have ability to accommodate it. This battery can integrate that sensor and alert for the need of distilled water. This battery is shipped without liquid so that it stays fresh until it gets activated with acid. It can be easily filled with 6 qt. of battery fluid at home.


  • It is compatible with any backup sump pump system
  • Longer runtime than basement watchdog emergency battery
  • Accommodates basement watchdog fluid sensor to alert for the need of distilled water
  • It has a compact structure
  • It is good in quality
  • 1-year warranty


  • The product is somewhat bulky as it weights around 49 pounds
  • Warranty period is small
  • An acid filling is required as the battery will be shipped dry, Process requires much safety
  • Voltage issues after long use