4 Pack CREJOY&trade; Makita Replacement BL1830 18-Volt LXT Lithium-Ion Battery CREJOY Professional Replacement makita BL1830 Battery Replacement PN.: BL1830 BL1815 194205-3 194309-1 LXT400 Voltage: 18V || Capacity: 4000mAh || Dimension: 7.2 x 2.7 x 7.1 inches || Weight: 1.1 pounds Overcharge and over discharge protection to increase the life of the battery 30 Days Money Back and 1 Year Warranty