Well is not exactly what I was looking because I really want to buy it.
This is a electronic design forum. You can easily purchase battery chargers at auto parts stores.
But thanks! My question is about connecting a charger and a device in parallel and use the charger as power supply.
My answer says go ahead and do just that.
What happen if they are connected in parallel and the charger is in the first step providing 2A. ¿How can i be sure that my device just take .2A and the others 1.8A goes to the battery? Because if not my circuit would be burn!
You should review the concepts involved in understanding Ohms law and DC circuits. The amount of current that a device will allow through it determined by it's resistance and the voltage accross it. You've already mentioned that the 14.7V charging voltage is not a problem for the devices that will be connected.