Deep cycle Batteries are specially designed for frequent cycling applications.The series battert uses high-tin alloy positive plate,active paste materials and stronger electrolyte,which gives 30% longer life than normal battery.Suitable for solar warter pumpming and wind power systems.There are all kinds of specification for your choice,like:deep cycle batteries for solar energy storage、12v 120ah deep cycle batteries、12v 60ah deep cycle batteries,etc.