The Ryobi P117 ONE+ dual chemistry charger is engineered to issue a full, fast charge to Ryobi 18V batteries of any chemical composition, including NiCd and Li-Ion. Depending on battery capacity, this unit can issue a charge in as little as 30 minutes, allowing users to juice up and get back to work more quickly. The charger boasts a comprehensive LED display to indicate to users when the battery is charged and in energy save mode, when a maintenance charge is being issued, when the battery is charging, when the battery Is defective, when the unit is testing the battery, when the unit power is on, and when the charger is experience a temperature delay. The advanced IntelliPort Technology protects battery cells, maximizes battery life, and conserves energy. Users can expect peak performance from the included P197 ONE+ 18V lithium-ion battery when it is charged using the P117. The Ryobi P197 is a heavy-duty battery intended especially for use with heavy-duty Ryobi 18V tools, such as circular saws (P508, P507), recip saws (P517, P516), impact wrenches (P1830, P261, P260), SDS drills (P222), hammer drills (P214, P213), other saws (P552, P523, P549, P531, P547), and other yard tools (P1121, P1111, P2603, P3260, P755, P2810, P770, P750, P2660, P2210, P2030, P2080, P2180). As another measure to improve user productivity, this battery features an on-board fuel gauge that allows users to determine the available charge before they start working. The compact, lightweight design of this battery (20% lighter than NiCd models) is less likely to contribute to user fatigue, making this battery a great addition to any of the 100+ Ryobi ONE+ tool models available.