HITACHI BSL1860 338-890 6.0 Ah 18V Li-ion Battery – Complete Equipment Sales & Service Inc.
Amazon.co.jp: BSL1860 Hitachi 18V Battery Compatible, 6.0Ah HiKOKI Hitachi Koki Lithium Ion Battery, Compatible with BSL1860b, BSL1830, BSL1840, BSL1850, Hitachi 18V Power Tool Replacement Battery, LED Level Display, Set of 2 :