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: KC04XL Battery, Voltage: 15.4V, Capacity: 53.2Wh 3454mAh, Type: Li-ion Battery, Package include: 1*battery 1 set matching installation tools. 1*Instructions. All our products are 100% brand-new from manufacturer. Up to 500 recharge cycles over the life of the battery Replacement for Part NumberKC04053XL,KC04XL,L08496-855,L08544-1C1,L08544-2B1,HSTNN-DB8P,HSTNN-IB8K,TPN-W133,TPN-W136 Compatible with ModelsforHP Envy X360 13-AG 13-AR 13-AH 13-AQ Series Quality AssuranceBOWEIRUI battery meets CE/FCC/ROHS/UL certified standards. Strict guidelines for compatibility, Use of built-in circuit protect