So after I waited 10 days on delivery (part came from China), I am totally surprised that you get a really good device for so little money. Now I have a couple of days and thoroughly tested even my believed dead backup battery is again fully operational. I'm totally thrilled! This part is handy and easy and ideal for travel. Could even be that the device, when you remove the plug will fit in Switzerland. Werd I test next week. Highly Recommended.