Q: What high-capacity battery fits the Lenovo ThinkPad X240 and X250? The 45N1126 (also known as 45N1124 / 45N1125 / 45N1127 / 45N1128 / 45N1134 / 45N1136 / 45N1738 / 45N1777) is the high-capacity OEM replacement battery for Lenovo ThinkPad X240, X250, X260, X270, T440, T440S, T450, T450S, T460, T460P, T550, T560, W550, W550S, L450, L460, P50S, K2450. Available in 72Wh, 48Wh, and 24Wh options. Ships with a 1-year warranty and is 100% brand new.
Product Specifications
| Attribute | Details |
|---|---|
| Battery Model | 45N1126 / 45N1136 |
| Capacity (6-cell) | 6.34Ah / 72Wh |
| Capacity (options) | 4.4Ah / 48Wh | 2.06Ah / 24Wh |
| Voltage | 11.22V / 10.8V / 11.4V |
| Battery Type | Li-ion |
| Cell Origin | Made in China |
| Color | Black |
| Warranty | 1-Year Warranty |
| Condition | 100% Brand New |
Replace Part Numbers
- 45N1136
- 45N1738
- 45N1134
- 45N1777
- 45N1124
- 45N1125
- 45N1126
- 45N1127
- 45N1128
Compatible Laptop Models
- ThinkPad X240
- ThinkPad X250
- ThinkPad X260
- ThinkPad X270
- ThinkPad T440
- ThinkPad T440S
- ThinkPad T450
- ThinkPad T450S
- ThinkPad T460
- ThinkPad T460P
- ThinkPad T550
- ThinkPad T560
- ThinkPad W550
- ThinkPad W550S
- ThinkPad L450
- ThinkPad L460
- ThinkPad P50S
- ThinkPad K2450
Note: Not compatible with X240S, X230S, P50, T450P, T460S, T470, T550S, T560S.
Flex-3 Compatibility Note
Q: Does 45N1126 fit ThinkPad X280, T470, or T480?
No. The 45N1126/45N1136 (external, 11.1–11.4V, 24–72Wh) is designed exclusively for the ThinkPad X240–X270, T440–T560, W550–W550S, L450–L460, P50S, and K2450 series with the slim-tip power connector. The X280 uses 01AV472 (11.4V, 48Wh internal), the T470 uses a dual-battery system (01AV420 internal + 01AV452 external), and the T480 uses 01AV489 internal. These later models have different battery connectors and power architectures. Always verify your exact ThinkPad model number before ordering.
Why Choose This Battery
The ultimate high-capacity power solution for Lenovo ThinkPad business laptops. Up to 72Wh capacity delivers extended runtime for all-day productivity and remote work. Built-in protection against overcharge, over-discharge, short-circuit, and overheating. Backed by a 1-year warranty.