CWK 7800mAh 9 Cell Capacity Battery for MSI Wind L2500 U135DX U270 BTY-S11 BTY-S13 MSI Wind U90 U100 U110 U115 U120 U230 U250 BTY-S11 BTY-S12 U90X ttery Advent 4211 MSI Wind12 U200 U210 U230 Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 7800mAh (Better than 6600mAh) 90 Day Money Back. Buy with confidence!