Battery 4 Cell 47Whr is Dell’s primary lithium-ion laptop battery, MPN 451-BBCT. Its 4 cells and 47 Wh capacity identify this variant in Dell’s Latitude E7440 configuration.
Dell also lists ExpressCharge with the battery. This indicates a charging feature associated with that configuration; the listing gives no charging time or runtime. The battery is suited to the documented Latitude E7440 configuration, and its cell count, capacity and lithium-ion chemistry describe this specific part.