Dell Authentic OEM Parts Item Model: CJ2K1; Battery Type: Li-ion; Voltage: 11.1V; Capacity: 65Wh/5700mAh; Battery Color: Black. Customer ServiceRest assured with 30 days Refund and 12 months Warranty; Note: return windows will close after one month, dont worry about it, you can click on seller store on right corner ask a question and contact seller directly.