Return Policy-After sale warrantyRest assured 30 days full refund.12 months free replacement for Non-human factors. Email reply within 24 hours. **Note: return windows will be closed after one month. After that, you can click on seller store name on right corner, you can see "Ask a question" on the page and contact directly for any problem. SpecificationsBattery Model Name: L18M3P74 , Voltage: 11.52V; Capacity: 51Wh 4345mAh Color: Black; Type: Li-ion Battery Battery life: Up to 1000+ recharge cycles over the life of the battery.