Lenovo 42T4654 | 4-CELL Li-Ion Battery for ThinkPad T400 R400 T61 R61

Here are the technical specifications for the Lenovo 4-CELL Li-Ion Battery for ThinkPad T400 R400 T61 R61:

- Battery type: Li-Ion
- Number of cells: 4
- Voltage: 14.4V
- Capacity: 2.0Ah
- Weight: 0.44 lbs
- Dimensions: 8.11 x 2.28 x 0.79 inches

Helpful notes:
- This battery is compatible with several ThinkPad models, including the T400, R400, T61, and R61.
- The 4-cell design provides a balance between battery life and weight.
- Li-Ion batteries have a longer lifespan and higher energy density compared to other battery types.