7.4v 31.5Wh Lapotp Battery For Microsoft Surface Windows RT SAMSUNG SDI 1516 P21GK3 21CP4/106/96 Battery type: Li-Polymer Replacement battery; Capacity: 31.5Wh; Voltage: 7.4V; Cell: 2-cell; Color: White; Battery Fit Part number:SAMSUNG SDI P21GK3 21CP4/106/96 Free Shipping to USA 12-18 day Delivery .One Year Warranty