Best Bluetooth Audio Receiver for Car Streaming?

[exzacklyright]

The best ones I came up with are these:

http://www.amazon.com/SMARTmini-Blu...=UTF8&colid=1E98OLTRHGG9&coliid=I2R9U1NL4C4W3

http://www.amazon.com/Miccus-Mini-j...UTF8&colid=1E98OLTRHGG9&coliid=I3CR2L3UALNOOC

The problem is I don't think I will enjoy charging them. Any that can just plug into the cig port?