Hello, I've a question, I bought a macbook magsafe power adapter (from an authorized reseller) for my macbook, as I had lost the previous one during moving. At the time I lived in Germany, so I bought it there, with no problems using it, then after about 10 months I moved back to UK, I then tried to put the UK adapter (just changing the small part of the magsafe power adapter to the UK one), but it didn't work when I connected it, I saw what could have been some sparks when I plugged it in, I tried changing it back to the EU adapter using an external adapter and nothing, I've also tried to plug it one when I went back to germany and it wouldn't work. I bought a new one here in the UK which works fine so far, but now I am going for a few days back to germany, my question is: could I leave it there with a friends and try for him to claim the warranty somehow (change for a new one or repair)?. I have lost the receipt, that is why I have doubts they"ll consider making the warranty valid, but is there someway they could track when the power adapter was bought and see that it is still under warranty (serial number or something)?. Anyways sorry for the long post, if anyone can give some advice on what to do with the non-functional power adapter. Is not a problem if I can't claim the warranty but if there's anything that can be done, I would like to try it. Thanks in advance for any tips or advice you might have. Julio btw: I did check that the adapter was not loose and that it was properly set.