You might find problems with USB chargers when the battery level gets low. It's a known problem, but not an issue if you keep the battery full or use the round charger hole. It's easy to get chargers for this port, it's the same as the Sony PSP. If you go with the great graphic above, you can use a cable like this (
http://www.amazon.com/Sony-PSP-Data-...ref=pd_cp_vg_1 ) to go from the brick's USB jack to the Sony round plug.