It offered that can not work here many chargers for Windows RT Tablet Nokia Lumia 2520. The Lumia 2520 tablet has a round about 2mm thick connector with about 20 volts for charging. Although it is a micro USB 3.0 connection available where but can not be charged, the Nokia Lumia 2520 tablet.
Therefore, the name of this charging plug for the Lumia 2520 is misleading and incorrect
Otherwise, the work for the Lumia smartphones already. But the charge current is not very high, I would therefore recommend to another charging plug