It efficiently converts18V-20V DC input from power tool batteries into a stable12V DC output. Specifically designed to work seamlessly with Ryobi 18V Lithium-Ion batteries, it is compatible with popular models includingP102, P103, P104, P105, P107, P108, P109, PBP002, PBP003, PBP004, PBP005, PBP006, P189, P190, P191, P192, P193, P194, P195, P197, BPL-1820G, BPL-1815, and BPL-18152.