Which USB cable to buy?

[anon(8829200)]

Does it matter if I buy USB 2.0 or 3.0 cable if I want to use it only for charging?

 

[Laura Knotek]

USB 2.0 will be sufficient, since that is the fastest supported by the hardware. Nokia Lumia 920 Specifications - Nokia

 

[xandros9]

USB 2.
Worth noting microUSB 3 is physically larger that 2.
However, phones with microUSB 3 are backwards compatible with 2.