In case of a defect, instead of repairing, the customer can return and exchange or refund a new one. Every battery and cell has been produced and tested very rigorously before being sent to our customer. We have our own factory and have been producing batteries since 2003, many years of experience in battery production and after sales service. (Battery)Item specifications:: Chemistry: Lithium-Ion (Li-Ion) Voltage: 18 V Capacity: 5000mAh Battery type: Replace for Makita Battery Condition: 100% New Warranty: 12 Month Contents of the delivery: 2X 18V 5,0Ah Battery Replace OEM part number: For Makita BL1815, BL1830, BL1835, LXT400, 194204-5, 194205-3, 194230-4, 194309-1 Compatible models: For Makita BCS550, BCS550F, BCS550RFE, BCS550Z, BCF201, BCF201Z, BCL180, BCL180F, BCL180W, BCL180Z, BCL180ZW, BCL182, BCL182Z BDA350, BDA350F, BDA350RFE, BDA350Z, BDA351, BDA351RFE, BDA351Z BDF450, BDF451, BDF451RFE, BDF451Z, BDF452, BDF452RFE, BDF452RHE, BDF452SHE, BDF452SHE, BDF453RHE, BDF453SHE,