Ryobi P105 18-volt One+ Lithium Ion High Capacity Battery 2 Pack Two P105 18V Lithium Ion Battereis Compared to 18V ONE+ Ni-Cd (P100): Up to 2X runtime, 20% lighter weight reduces user fatigue Fade-free power for maximum performance Compatible with all Ryobi 18V ONE+ tools Charge only with 18V ONE+ dual-chemistry chargers