those things are sensitive with batterys the 2010s and up have a sensor/meter device that will go off (amber light) when it reads battery is done or is giving it low voltage. If you replaced the battery yourself i suggest you take it back to dealer to get the battery counter reset, it has to be reset with SDD or you will get that amber light to come back sooner than you want. and as far as batterys go under warranty depending on your dealer and miles they might cover it its kind of a wear and tear item and i know for the 2010 they did away with wear and tear items and services under warranty but brought it back for 2011. hope this helps havent posted in a while