2X For Metabo BSL36A18 18V / 36V 6Ah Li-Ion Multi Volt Battery BSL 36B18 372121M
371751M / 372121M / BSL36A18 / BSL36B18. (3.0 Ah when used in 36V MultiVolt tools.). 2X Battery. Battery Composition - Li-ion. Do not put battery into water and fire. Do not Separation, extrusion, and impact.