2 x ExpertPower 18v 1500mAh Li-ion Battery for Hitachi BCL1815 EBM1830 - - Amazon.com
Fancy Buying [2 Pack] 6000mAh 18V Li-ion High Capacity Battery 327730 327731 326240 326241 for Power Tools Hitachi BCL1815 BCL1820 BCL1825 BCL1830 Lithium-Ion HXP Battery Pack Black - - Amazon.com
Synergy Digital Power Tool Battery, Compatible with Hitachi BCL 1815 Power Tool, (Li-ion, 18V, 5000mAh) Ultra High Capacity, Replacement for Hitachi BCL 1815 Battery - Walmart.com
TREE.NB 18V Longer Battery Life Battery for Hitachi BCL1815, BCL1830, BCL1840, 327730, 327731, 326240, 326241 : Tools & Home Improvement - Amazon.com
Original Hitachi Lithium Battery BCL1815 18 V - 1,5 Ah