I have own my Karma since 2011. Honestly, I have not even gotten close to 50 miles per charge. I know it really depend on the driving condition, hills, etc. I have tried without A/C, without radio, flat highway, etc. I am averaging 30 to 35 miles per charge. I was told by my dealer that the battery range should improve after several cycles. It has been at least 4 months worth of charge cycles, and I have not seen any improvement. My car went into the shop today for 6.15 from 6.14.2. I wonder if that will make a difference. What are your ranges per charge?