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: A1965; Battery Type: Li-ion; Voltage: 11.4V; Capacity:49.9Wh/4379mAh; Battery Color: Black.