IBM ThinkPad X20 Series Battery are made from a grade cells and highest quality parts,the IBM laptop battery are tailored made according to the original size,
whether the battery appearance, size and quality are the same as with the
original. Every IBM ThinkPad X20 Series laptop battery should be under strict quality
control including filtration and safety testing of voltage,capacity and
battery core before leaving the factory, and has passed the authentication
of CE, UL, EMC, CQC,ROHS, etc.

IBM ThinkPad X20 Series batteries features:
Uses the highest quality cells.
100% Q.C. of EVERY product. Extended run time.
1 Year Extended Warranty.
Excellent Service.
100% compatible with original battery.

Compatible Part Number:
02K6651,02K6678, 02K6712, 02K6837, 02K6838, 02K6839,
 02K6850, 02K6852, 08K8024, 02K6653, 02K6678, 02K6679,
02K6710, 02K6758, 02K6759, 02K6760, 02K6761, 02K6845,
02K6846, 02K6854, 08K8024, FRU 02K6652, FRU02K6653

Fit Models:
IBM
IBM ThinkPad X20 Series
ibm ThinkPad X20 2660-XXX, ThinkPad X20 2661-XXX
ThinkPad X20 2662-XXX

IBM ThinkPad X21 Series
ibm ThinkPad X21 2660-XXX, ThinkPad X21 2662-XXX

IBM ThinkPad X22 Series
ibm ThinkPad X22 2660-XXX, ThinkPad X22 2662-XXX

IBM ThinkPad X23 Series
ibm ThinkPad X23 2660-XXX, ThinkPad X23 2662-XXX

IBm ThinkPad X24 Series
ibm ThinkPad X24 2660-XXX, ThinkPad X24 2662-XXX

Specification:
Battery Type: Li-ion,  Voltage: 10.8V,  Capacity: 4400mAh