BTI battery compatible with Fujitsu Lifebook T937, T938, U7410, U747, U748, U757, U758. OEM P/N:CP721834-01, FPCB531AP, CP734928-01, FPCBP529, FMVNBP247, FPCBP531, FPB0338S,FPCBP531AP We recommend: Advance exchange for this product is available directly through Origin Storage throughout the 18-month warranty period. Please note: Please get in touch with us if you have any questions.