Eznsmart High Capacity 9-cell Replacement Battery for Laptop Battery 45K1275, L08C3B21 for Lenovo IdeaPad S9, S10 Series (NOT compatible with IdeaPad S10-2 S10-3) PortaCell (9 cells/Samsung, Hi-Capacity 7800mAh/87Wh, 11.1V) OEM compatible replacement. Brand-new OEM compatible replacement Meets or exceeds OEM spec. with longer run time. FREE UPGRADE to USPS Priority Mail service on all orders over $75- (delivers within 2 days to most cities) 3 months limited warranty.