Wanting to pick up a new battery for my moms Taurus, the one in it is several years old. She makes an 80-100 mile commute daily so I want to make sure it’s reliable. Looks like the two options are a group 65 and 36r. Does anyone make an agm battery in either size? The majority of what I usually see are all group 31 or larger batteries and the smaller automotive sizes are confusing me. I figure I can get a good quality battery for $150 or less. Maybe not?