The DataSafe DX 4DX-17B was built with high-rate UPS applications in mind. With a lifespan of up to 20 years and four cells for maximum efficiency, these batteries were created with ease in mind. Because they have four cells, customers dont need to purchase as many of them, and installation and maintenance costs are lowered as well. The DataSafe DX 4DX-17B is a calcium flat-plate battery with an optimal grid and dual lug design, in addition to a heavy duty strap and plate lug. A flame-resistant PVC cover offers protection during emergencies.