The 2014 Range Rover battery location is found in the trunk’s spare tire well.
To access it, simply lift up your trunk’s floor panel, and beneath the spare tire, you should be able to see your battery.
If you’re looking for your auxiliary battery, it’s located behind a panel on the right-side wall in the trunk area. To look at it, you’ll need to gently pull off the side wall panel, being careful not to damage the clips that hold it in place as you do so.