Synergy Digital Power Tool Battery, Works with Hitachi RB 18DL Power Tool, (Li-ion, 18, 4000mAh) Ultra High Capacity, Compatible with Hitachi 326240, BCL 1815, EBM 1830 Battery - Walmart.com
Battery for HITACHI EBM1830 Black 18V Li-ion 4.0Ah NEW - Newegg.com