Using this circuit you can easily charge any Ni-Cad battery from 50 to 400 mA charging current. You can easily charge more than one battery at a time. The charging current can be selected according to the battery you are going to charge. It is absolutely safe for your expensive rechargeable batteries.

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Charging current: 50-400 mA (selectable) Working voltage: 12-24Vac Suitable Transformer (not supplied): 2x12Vac/0.5A PCB Dimensions: 56x128mm Solder posts for all connections.