Zoeller Aquanot® AGM Batteries feature a sealed, maintenance free design that delivers absolute dependability. The battery features a sealed design with heavy-duty internal construction to deliver reliable, maintenance-free backup power on demand. It also includes endurance features such as high-strength glass mat separators that ensure a quick recovery from deep discharge. Additionally, the battery is super easy to install and inspect. Aquanot® batteries are purpose-built backup power solutions that work precisely with Zoeller backup pump systems. The battery is designed to deliver a useful life of 4 to 5 years. When Zoeller battery backup sump pump is called on to perform, you don't want the battery to be the weak link! Features: Built for applications where reliable maintenance-free service is a requirement Designed with a 4 to 5 year service life in mind 3-year limited warranty: this model comes with warranty coverage from Zoeller Pump Company, giving you extra protection and more peace of mind To be used in conjunction with Aquanot 507 or 508 battry back up sump pump systems