Bosch Battery: Bosch, 18V, Li-Ion, 1 Batteries Included, 4 Ah, CORE18V, (1) Battery, 18 VDC

These tool batteries fit Bosch cordless tools of the same voltage and a compatible series. For example, a 12V Max battery will fit Bosch 12V Max tools and an 18V Max, CORE, or SlimPack battery will fit any series of Bosch 18V Li-Ion tools. CORE series batteries provide longer run times and more power than Max and SlimPack series batteries. SlimPack series batteries have more power than Max series batteries and are lighter and more compact to help make large tools easier to handle. Batteries of the same voltage and series may be available in different amp-hour (Ah) ratings. Batteries with higher Ah ratings have greater power storage capacity but are heavier than those with lower Ah ratings.