It is certainly not a secret that this battery has been discontinued by Standard Horizon. Now the question is what do you do with your old battery that has gone belly up? The answer is simple. Send your Standard Horizon CNB350 battery pack to MTO Battery and allow us the opportunity to rebuild it for you. What is a rebuild you might ask? A rebuild is where we carefully open your CNB350 battery case and remove all of the old battery cells and replace them with new higher capacity cells. We provide a great product at a very good price. If you would like to purchase a Standard Horizon CNB350 Battery Rebuild Service then please CLICK HERE.