42Wh 3-cell Lithium-Ion

The Dell 2WH4J is a replacement battery for compatible Dell notebooks, providing portable power when the notebook is used away from a mains connection. The description does not specify particular notebook models, so check that your device calls for this battery.

It uses lithium-ion technology and has 3 cells, with an energy capacity of 42 Wh and a charge capacity of 3500 mAh. These figures describe its energy storage and cell configuration.

The catalogue identifies this model as a Dell spare battery.