T1G4M - Dell 4-Cell 40WHr 14.8V Li-Ion Battery for Inspiron 15 3521

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

- Battery Type: Li-ion
- Battery Capacity: 40WHr
- Number of Cells: 4
- Voltage: 14.8V
- Watt Hours: 40Wh
- Dimensions: 10.8 x 4.2 x 0.8 inches
- Weight: 10.6 ounces

Helpful notes:
- This battery is compatible with the Dell Inspiron 15 3521 laptop model.
- It is a 4-cell battery, which means it has a lower capacity than a 6-cell battery but is more lightweight.
- The battery's voltage is 14.8V, which is a standard voltage for laptop batteries.