The X121E is a 10.8V/11.1V 63Wh (5.6Ah) high-capacity 6-cell Li-ion replacement battery for Lenovo ThinkPad E120, E125, E130, E135, E145, E320, E325, E330, E335, L330, X131E and X140E laptops. It replaces OEM part numbers 45N1056, 45N1057, 45N1058, 45N1059, 45N1060, 45N1062, 45N1063, 45N1174, 45N1176, 42T4947, 42T4948, 42T4951, 35+ and 84+. Built with premium grade-A cells and integrated BMS to manage thermal levels, ensure original runtime and safety, backed by a 1-year warranty.
Product Specifications
| Battery Model: | X121E / 84+ |
| Capacity: | 5.6Ah / 63Wh |
| Voltage: | 11.1V / 10.8V (Compatible) |
| Battery Type: | Li-ion |
| Cells: | 6 Cells |
| Color: | Black |
| Condition: | 100% Brand New Replacement |
| Warranty: | 1-Year Warranty |
Replace Part Numbers
- 42T4951
- 45N1058
- 45N1059
- 45N1176
- 45N1060
- 45N1063
- 45N1062
- 45N1057
- 45N1056
- 42T4947
- 42T4948
- 45N1174
- 35+
- 84+
Compatible Laptop Models
- ThinkPad X121E
- ThinkPad X130E
- ThinkPad X131E
- ThinkPad X140E
- ThinkPad E120
- ThinkPad E125
- ThinkPad E130
- ThinkPad E135
- ThinkPad E145
- ThinkPad E320
- ThinkPad E325
- ThinkPad E330
- ThinkPad E335
- ThinkPad L330 Series
FAQ
- Q: Does this battery fit the ThinkPad X131E?
- A: Yes — the X121E battery is fully cross-compatible with the X130E, X131E and X140E models.
- Q: How can I maximize battery longevity?
- A: Avoid extreme heat; perform a full discharge and charge cycle once a month to calibrate the smart chip and ensure accurate capacity reporting.