KATSU FIT-BAT Cordless Tools Range they all take the same battery, works on both 18V or 21V, compatible with LXT range, use your current or easy to find on amazon (compatible with BL1850 BL1860B BL1855 BL1840 BL1830 LXT-400 BL1820B BL1815)
With brushless motor the battery lasts almost twice longer than normal brushed motors, in addition it is maintenance free
Design with soft-grip and is ideal for overhead,horizontal,and downward drilling applications
Wide range of possible applications thanks to drilling, hammer drilling and chiselling functions
Bare unit in box, comes without battery or charger