does the charger have a manual inside the door?
usually they do and there are instructions on how to change voltages. If you dont have the manual it will be hard to guess at it, you DONT want to guess , you need to be sure.
transformers in meltdown mode are stinky and make lots of smoke :o(
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.