I can't believe there isn't already a thread for this. Point me in the right direction if there is. Here is my experience. I have a 2012 P85 VIN#...413. I have had the car a little over a year. Great car! My mom lives 170 miles from me. I normally charge to 100% to be safe. We cut it close in the winter one night when the temp was about 12 degrees. We had 17 miles left when we got home. A 100% charge gets me to about 244 miles. Yesterday I decided to try only charging to 90% for this trip. 220 miles range for 170 mile trip seems reasonable. BTW the trip is mostly interstate. Navigation started out telling me I would have 6% battery left when I arrived. I could live with that. Off we go and I am getting slow down messages the whole way, but I keep it set on 72 mph. After it got dark, the remaining percentage started to drop. First 4%, 2%, 0%, -2%. Now I get a little nervous. I decide to press on. I had heard you have approximately 12 miles spare range. Let's see what this thing can do. I did have a supercharger option in Nashville that was about 30 miles out of the way. After two warnings to find a charger, and 10 miles from mom's, the car starts shutting down and says to safely pull over. The range says we have 9 miles left. So much for he 12 miles of spare range rumor. I am losing speed, but luckily am near an exit. I get off and basically coast into a gas station. I probably drove 1.5-2.0 miles after the shutting down message. Now what, call mom, call wrecker, charge here, phone a friend? I call mom and let her know we are stuck. She is not comfortable driving after dark to pick us up. I try to call a wrecker - no answer. I look around for a plug. There is one on the side of the building. The car won't start and says battery too low. Nor will it go in neutral to let me try and push it 50 feet to the plug. Finally I ask a guy getting gas next to me in an RV if he has a generator and can I get a short charge. He nicely agrees. We plug it in for about 10 minutes. BTW the range went to zero as I coasted to a stop. It still showed zero but would start and I pulled over next to the 110V plug. I gave his kids two bucks each to buy some candy and thanked him. Now the 110V plug was dead. A nice attendant at the store helped me plug into the ice machine plug nearby. Luckily, I have an extension cord to reach. It starts charging at 3 mph ): They tell me I can charge if we donate to their children's campaign. I gladly give them 20 dollars. We call my sister to pick us up and we leave my baby there at the gas station. It took about 4 hours for the range to read above zero. Now nine hours later, it reads 21 miles. We are going to get it at six this morning. No fun, but it could have been worse. I paid my sister $20 for her gas. All total this is going to cost me $44. Could have been much worse. Lessons learned: 1) Navigation is accurate- range is not. I am disappointed with only getting 160 miles from 220 miles of range. I averaged 336 wh/mile for this trip. 2) My battery goes dead at 9 miles of range. 3) Anytime navigation gets below 5%, look for a charger. 4) Always charge to 100% to go to mom's.