FW1MN - Dell 4-Cell 40WHr 14.8V Battery for Inspiron 15 3521

Here are the technical specs for the Dell 4-Cell 40WHr 14.8V Battery for Inspiron 15 3521:

- Battery type: Lithium-Ion
- Number of cells: 4
- Capacity: 40WHr
- Voltage: 14.8V
- Color: Black
- Dimensions: 10.79 x 4.17 x 0.79 inches
- Weight: 10.4 ounces

Helpful notes:
- This battery is compatible with the Dell Inspiron 15 3521 laptop.
- It is a 4-cell battery with a capacity of 40WHr, which means it can provide a decent amount of power for your laptop.
- The lithium-ion technology used in this battery ensures longer life and better performance compared to other battery types.