Oct 11, 2018 · I do mostly highway driving. Anywhere from 55-75mph typically. My air conditioning is usually on but at a low setting, the radio is always on, and my phone is usually charging. I don’t tend to drive too hard. I charge it every 2-3 days to 80% and recharge when it’s between 20-35%. This doesn’t seem anywhere close to the 310 range they state.