I bought this charger in the hope that it will be faster.
http://www.amazon.de/Qualcomm-zertifiziert-Schnellladegerät-Ladegerät-EU-Stecker/dp/B00RCZTNQS/ref=sr_1_12?s=telephone&ie=UTF8&qid=1434026927&sr=1-12&keywords=anker
18W vs. 13W
But it's as slow as the original Surface charger.