The Dell 451-BCUE laptop battery is listed for the Inspiron 13 5310, providing battery power when you use the laptop away from a mains connection.
It uses Li-Polymer chemistry and has a rated voltage of 11.25 V. Its charge capacity is 3640 mAh and its energy capacity is 41 Wh. These figures identify this battery variant and help distinguish it from versions with a different capacity.
This description refers specifically to MPN 451-BCUE for the Inspiron 13 5310.