I drive in ECO mode 99% of the time. This favors battery usage over battery reserve. It took me a couple of months to figure out it's bet to switch to sport mode about a mile ahead of the bog hill I encounter every day to the engine doesn't whine due to low battery. I'm in a relatively hilly area. The "flatlanders" likely never see much of a battery variance, so it will likely hang out in the top-middle of the gauge.