Lithium-ion battery (LiIon), 11.1 V, 4400 mAh, replaces manufacturer article numbers of Clevo, Terra W540BAT-6, 6-87-W540S-4U4, 6-87-W540S-4U41, 6-87-W540S-4U42, 6-87-W540S-4W41, 6-87-W540S-4W42, 6-87-W540S-427, 6-87-W540S-4271, 6-87-W540S-4272Suitable for the following laptop models:Terra Mobile 1529 (1220252, 1220263), Terra Mobile 1529H (1220328, 1220478), CLEVO W155EU, W155U, Clevo W540, W540EU, W545EU, Clevo W550, W550EU, W550SU, W550SU1, W550SU2, Clevo W550TU, W551SU1, W650KK, NEXOC B509II