I just bought a 2019 Nissan Leaf and I'm a little concerned about my battery charge dropping dramatically to 0% in just a few miles. Twice now I've left the house with about 50% left on the battery charge indicator. I live in Colorado and work in the foothills near Denver. My commute is 11.5 miles/18.5 Kilometers. The first 3 miles are on residential streets and 8.5 miles are on highway. Once I get on the highway there are about 6 miles of relatively steep hill to climb. With a full charge I will use 16-18% of my charge depending on whether or not I have the heated seat on low and the heated steering wheel on. If I start out with 50% or less on the charge indicator it can go from 44% (approx. what's left when I start the hill climb) all the way to 0% within a couple of miles and a couple of minutes of starting the hill climb. The car will slow down and enter turtle mode and I have to limp the remaining 3 miles to work . My speed is typically 65 mph / 104 kph, outside temperatures have varied from 25F/-3C to 40F/5C, eco mode is on, the heater is off, heated steering wheel is off and the heated seat is off. I've been trying to only charge the battery to 80% and not let it drop below 20%, but that is really hard to do when the charge plummets so quickly. Is this normal to have such a dramatic difference between the charge used when fully charged vs the charge used when half way charged when climbing a hill?