Battery, 56WHR, 3 Cell,

The Dell 451-BCKQ is a three-cell Li-Ion battery for a Dell laptop. Its stated energy capacity is 56 Wh. It is intended for systems that use this exact battery variant, so check the part number when choosing a replacement.

The three-cell configuration and Li-Ion chemistry describe its construction. This battery supplies power to the laptop when it is used away from a mains connection.