$900+ battery with a 2 year warranty. Purchased Banshee lithium 100ah battery in August of 2020, and now it will not take a charge in April of 2023. *******@batteryjack.com states that I'm outside of the 2 year warranty window and will not help. So now I have a $900 paperweight. To say I'm disappointed is an understatement. If you want a $900 battery that lasts 2 years, go for it. Definitely not the savings claimed by the company.