You say it's a new battery? Maybe not. I have a 2014 Dodge Ram just a year old and on my second battery. It all depends how long that battery sat before you bought it in my case with a new truck the battery should have lasted for a least 5 years in this desert. Either that or you have something draining on the battery while it's sitting. Try disconnecting the battery while sitting then hook it back up it's the battery if the conditions stay the same