Can anyone recommend some products I could use to make almost an "AC" charger for the PCM-A10? Ideally, I'd like to plug the A10's USB into a female USB long wire, which terminates in a wall plug. I could then charge by plugging it into the wall. I see two parts that will do the trick, but I'm not sure how safe the USB to wall charger plugs are. Would a typical iPhone square wall plug work ok, or do I need to worry about voltage/current for different plugs?