Charger with restrictions

The loader device I use for my cell phone and the navigation in the car boot.
But to find a safe and uninterrupted contact in the car outlet is hit or miss. Often loses xubix the connection that goes out blue indicator light and the charge will stop. Another disturbing point is that the radio reception in weak radio is severely disrupted. The manufacturer would have the contacts as well as the disturbance response revise. Then you could also assign four points.