68Wh Lithium-Ion laptop

Dell 451-BCIS is an internal lithium-polymer replacement battery for compatible Dell laptops. Its primary part number, N35WM, identifies it in parts listings.

The four-cell battery is rated at 68 Wh (also listed as 8500 mAh) and has a 7.6 V output. These figures help match the battery’s capacity and electrical rating to the laptop.

Listed compatible systems include Dell Latitude 14 (5400), Latitude 15 (5500), and Precision 15 (3540). It also fits the Inspiron 15 2-in-1 (7590), provided the laptop has no 2.5-inch HDD installed.