Dell JNYT4 is an internal notebook battery that supplies stored electrical energy when the laptop is used away from a mains connection. The MPN identifies this specific battery variant.
It uses lithium-polymer technology and has three cells. Its stated energy capacity is 57 Wh, charge capacity is 4878 mAh, and output voltage is 11.4 V; these values describe its electrical characteristics.
The listed compatible models are Dell Latitude 7340, 7350, 7440, 7450, 7640 and 7650. For these notebooks, JNYT4 is an internal power source for mobile work, study and everyday use, and the model list helps identify whether this replacement part matches a particular Latitude.