The compact Ryobi P118-B battery charger will charge all ONE+ 18V batteries in 60 minutes or less, whether they have a NiCd or Li-Ion composition. This battery charger protects battery cells and conserves energy, thus maximizing battery life. The diagnostic system provides the charging status and informs the user if the battery is getting too hot or too cold to charge. Compatible Ryobi battery models include P102, P103, P104, P105, P107, P108, P197 (sold separately). This battery charger requires 120V 60hz input power and has a 2-prong North American plug.