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 Basic DetailsItem Model: RJ40G; Battery Type: Li-ion; Voltage: 15.2V; Capacity: 63Wh/ 3941mAh; Battery Color: Black