Amazon.com: TREE.NB 18V Longer Battery Life Battery for Hitachi BCL1815, BCL1830, BCL1840, 327730, 327731, 326240, 326241 : Tools & Home Improvement
Amazon.com: [1Pack] 18V 5.0Ah High Power Battery for Hitachi Power Tools Fit BCL1815 BCL1820 BCL1825 BCL1830 BCL1840 EBM1830 327730 327731 18-Volt Battery : Tools & Home Improvement
Amazon.com: ARyee 14.4v 4000mAh Replacement Battery for HITACHI BCL1415 BCL1430 EBL 1430 326236 326823 326824 327728 327729 Cordless Power Tool Li-ion Battery (1) : Tools & Home Improvement