Micro USB Connector: Socket to solder onto a board for charging purposes. This is the Micro which is the same cable plug used for many phones etc so the plug is common.

Information 20 pieces for $6.99 but this was only a quick search, there will probably be better prices out there.
http://www.aliexpress.com/item/20-Pcs-Per-Lot-Micro-USB-Type-B-Female-5-Pin-DIP-Ejector-Socket-Connector/1769292996.html
This one is 10 for £0.99 and is completely SMD style so I will get them to try the robustness of it. http://www.ebay.co.uk/itm/10-X-Micro-USB-Type-B-Female-5Pin-Socket-4Legs-SMT-SMD-Soldering-Connector-/291269805352?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item43d1088528
This one has pins so I will be able to solder through the board. This will hopefully make a stronger connection as I’ve had these fall off very easily.
micro_USB_jack