These dual container Rolls Deep Cycle Industrial Flooded batteries from Surrette are high-capacity batteries with a heavy-duty plate grid to resist positive plate breakdown. The plates are double insulated with a glass mat and a polyethylene envelope to prevent separator misalignment, cracked separators, treeing, or shorting at the bottoms or sides. Rolls batteries are rated at 3200 cycles at 50% depth of discharge. Each 2 VDC cell is built into its own lightweight container made of durable polypropylene with the cover thermally bonded to the container to prevent acid leakage. The cells are then assembled into a tough, lightweight polyethylene outer container with a removable lid. Even if the outer case is broken, the battery remains operable and spill-free. The individual cells of the CS and KS series are bolted together allowing the battery to be disassembled. The cells can be independently removed, which facilitates easy on-site installation, disassembly, assembly, or replacements of individual cells without special skills or tools. All 5000 Series Rolls Batteries, including the CS & KS models, come with a 10-year limited warranty, 3-year full warranty, and 7-year prorated warranty.