HI Ruben!
On Mars everything is free! The premise is the cost of science and scientists here on earth! Time is money and scientists are paid to run the rover and do science with it. Standing still (charging or thinking about steps) is wasting resources. The space agency only pays within the budget and the budget only grows with scientific results, by reaching those points of interest, therefore, not working costs money and when there is no money, there is no mission! Game over... crashing the rover will also kill the mission!
About the battery indicator... Yes, you're right, and the mockup I draw on last Sunday had some bars instead of numbers, but, I didn't have much time to make love this week... ah ah!
Thanks for the ideas... We need to go for a coffee sometime!
