Q: What internal battery fits the Lenovo ThinkPad X240 and T440? The 45N1110 (also known as 45N1108 / 45N1109 / 45N1111 / 45N1112 / 45N1113 / 121500143 / 121500144) is the OEM replacement internal battery for Lenovo ThinkPad X240, X240S, X250, X260, X270, T440, T440S, T450, T450S, L450, L450S. Rated at 24Wh / 11.1V, 3-cell Li-ion (Made in Japan). Ships with a 1-year warranty and is 100% brand new.
Product Specifications
| Attribute | Details |
|---|---|
| Battery Model | 45N1110 / 45N1108 |
| Capacity | 2.09Ah / 24Wh |
| Voltage | 11.1V |
| Battery Type | Li-ion (3 cells) |
| Cell Origin | Made in Japan |
| Color | Black |
| Warranty | 1-Year Warranty |
| Condition | 100% Brand New |
Replace Part Numbers
- 45N1108
- 45N1109
- 45N1110
- 45N1111
- 45N1112
- 45N1113
- 121500143
- 121500144
Compatible Laptop Models
- ThinkPad X240
- ThinkPad X240S
- ThinkPad X230S
- ThinkPad X250
- ThinkPad X260
- ThinkPad X270
- ThinkPad T440
- ThinkPad T440S
- ThinkPad T450
- ThinkPad T450S
- ThinkPad L450
- ThinkPad L450S
Flex-3 Compatibility Note
Q: Does 45N1110 fit ThinkPad X220, X230, or T430?
No. The 45N1110/45N1108 (11.1V, 24Wh, 3-cell internal) is designed exclusively for the ThinkPad X240–X270 and T440–T450 series that support internal + external dual-battery setups. Earlier models like the X220 (external 29++, 0A36282), X230 (44++, 0A36305), and T430 (70+, 0A36303) use external-only batteries with different connectors and voltage rails. Always verify your exact ThinkPad model number before ordering.
Why Choose This Battery
Precision-engineered internal replacement for Lenovo ThinkPad business laptops. Japanese Li-ion cells deliver stable 11.1V output and 500+ charge cycles. Slim design preserves the ThinkPad profile with no added bulk. Backed by a 1-year warranty.