PowerMall High Capacity 18V 4000mAh Li-ion Drill Replacement Battery for Hitachi BSL1830 DS18DSAL BSL1815X Cordless Tools Battery Condition:100% brand new Battery Type:Lithium-Ion / Voltage:18V / Capacity:4000mAh No memory effect. Can be charged or discharged as needed without loss of capacity We promise our product 30 days money back,1 year free exchange and 24 hours service. 1 Year Warranty,Any question,please tell us