Longacre Replacement ComputerScales Charger - 52-72552Replacement for earlier scale systems that use rechargeable batteries. (Most of the new systems use replaceable alkaline batteries that do not get recharged.) They are 12 volt output with 2 different style control box plugs. Look at your old one to see which you need. These are for 110 volt input. 220 chargers are available. Contact the factory.