After sale warrantyRest assured 30 days Money Back.12 months free replacement for Non-human factors.Email reply within 24 hours. 24 months After-sale (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: RE03XL , Voltage: 11.55 V; Capacity: 45 Wh/3750 mAh Color: Black; Type: Li-ion Battery Battery life: Up to 1000+ recharge cycles over the life of the battery. Size:L:7.25 in W:4.0 in H:0.25 in