Compatible with Ryobi 18V NiCad Battery: For Ryobi 18V P100, P101, ABP1803, BPP-1813, BPP-1815, BPP-1817, BPP-1817/2, BPP-1817M, BPP-1820, BPP1817M. Compatible with Ryobi 18V Lithium Battery Compatible with battery Ryobi 12V 14.4V 18V MAX One+ Plus Ni-Cad, Ni-Mh & Lithium-Ion Battery.