If you are reading this you are answering my call in my hour of need. I have some work I need to hand in tomorrow, but I stupidly left my charger at my girlfriends house, who lives on the otherside of London. In short i have looked around Apples webiste, tried phoning customer help, which are closed due to it being sunday evening, but I cant find an answer to this question, would my 15 inch Macbook Pro 2010 battery life be damaged by using my sisters Macbook 13inch 2010 adapter? Are all 2010 magsafes the same internally? Thanks!