Hitachi RM 2500 Electric Shaver "using 220v damage motor" Questions

...220v outlet this time with a step down transformer (220-110v) rated (up to) 500 w. I turned it on and it did the same thing as before with the same results. Question: what type of converter should I ...

...220v. outlet while it was on 110v. mode Hi, It would be logical to assume that the charging circuitry is damaged. If you are considering a DIY (do-it-yourself), then pls determine the limiting ...