This rechargeable Li-Ion battery is compatible with various Dell laptop models, including the Inspiron N4010, Inspiron 17R N7110, Inspiron 5010, and Vostro 3450/3550/3750. With a battery capacity of 48 WH and voltage of 10.8 V, this battery is sure to provide long-lasting power for your device. In addition, this battery comes in a sleek black color and is type 8858X. It is important to note that the number of battery cells is not specified. This battery is perfect for those looking for a replacement or backup option for their Dell laptop.