CWK 7800mAh 9 Cell Capacity Battery for Lenovo ThinkPad 42T4755 42T4756 42T4757 42T4758 42T4763 42T4764 IBM Lenovo ThinkPad Edge 14 05787UJ 05787VJ 05787WJ 05787XJ 05787YJ Lenovo ThinkPa Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 10.8 Volt (11.1 Volt compatible) Capacity: 7800mAh (Better than 6600mAh) 90 Day Money Back. Buy with confidence!