We are a Leading brand on computer power supply technology including batteries and adapters charger. Our products have passed CE, FCC, EN62133 international battery testing and certifications, which ensure safety and durable.

You may find battery detail specification as below:
Capacity:2.09Ah/24WH
Voltage:11.1V
Battery Type: Li-ion
Color:Black
The Part Number:X240
The Model Number Attributes: X240_45N1110 Internal Battery
Replace Battery Part Numbers:
45N1110 45N1111 45N1108 45N1109 45N1112 45N1113 121500144 121500143

Compatible Laptop Models:
For Lenovo ThinkPad X240 X250 X260 X270 T440 T440S T450 T450S T550 L450 L450S W550 W550S Seires

Excellent Customer After-sales:
Shipped next business day
30-day Money Back
24-Month Quality
Free After-sales Technology Support by email
Battery Use Tips:
1.Please discharge the new battery capacity to 5% ,not to 0% and then charge to 95%, and cycle 3-4 times before normal use.
2.Don't connect adapter for a long time while using the battery. It may damage the battery.
3.Do not use or store the battery in hot or humid conditions.
4.If you remove the battery for a long time, charge it more than 80% at least one time within one month.
5.Do not disassemble, crush or puncture the battery. Do not dispose of the battery in fire or water.