Simple way to convert Ryobi charger from 120 to 220-230 volt

Weight calculator: http://uzneo.com This video shows how we have changed 120 volt "Ryobi" Charger to 220-230 volts and looks that this is simplest way. Now it's works well and stable. By the factory, there is voltage doubler installed inside. We just have changed such douybler to regular rectifier, only by cutting the foil on Ryobi charger electric plate and just changed varistor to higher voltage. That's all.