The DataSafe DX 4DX-7B and the other 4DX models share the DX 2DXs level of cost-effectiveness and quality, but with four cells instead of two. This gives the 4DX maximum power with all of the convenience of the DataSafe DX series. With its calcium flat-plate battery construction, optimal grid and lug design, and heavy duty plate lug and strap, the DataSafe DX 4DX-7B is built to handle high-rate UPS applications. The four-cell construction makes the battery as efficient as possible. Maintenance and installation with the 4DX-7B is hassle-free. Each DataSafe DX battery has a patented Slide-Lock post seal. Both the included fire-resistant PVC cover and the optional larger fireproof container seal the battery to protect it from breaking and leaking during a fire.