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Dual Chemistry Battery Charger for One 18 Volt Batteries. 18V dual chemistry charger can charge either lithium ion or NiCad batteries. The P118 charger is Energy Star Qualified meeting the energy efficiency guidelines and using an average of 35% less energy than other battery chargers. For added convenience, the P118 has a keyhole hanging feature for saving storage space. Convenient cord wrap keeps the cord out of the way when the charger is mounted on the wall or being stored.