Compatible Part number: 807612-421, 807956-001, 807957-001, HS03, HS04, HSTNN-LB6U, 807957, HSTNN-LB6V, LB6U | Compatible Model:HP 240 G4 HP 245 G4 HP 246 G4 HP 250 G4 HP 255 G4 HP 256 G4 | 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. | All products are Certified by CE, FCC for safety. Strict guidelines for compatibility, and standards compliance for environment safety. | Warranty: Free replacement within 12 months(no exchange but resend new one), 30 days money back guarantee. CONTACT US: Please contact through "Your Orders" tab in Amazon account (allow 24hrs for reply).