I have a TracFone, model LG440G. It came with a charger that only plugs into a 110V outlet. I need a mobile charger that will connect into my car's cigarette lighter for 12Volt charging. I have a Sprint car charger, Model KPS400BMCU, says input is 12V/o.55A, output is 5V max/0.85A. Can someone tell me if this auto charger is compatible with TracFone Model LG440G? Thanks!