The final rental at the end of May, a four wheeled (decided to go with stability) model. Even with a small battery, I could handle the neighborhood hills (Earl followed me in the car since the machine was new and unfamiliar; did I mention he had fractured his leg and was on crutches?) and didn’t appear to lose a charge. I could even meet my friend Barbara for coffee at Starbucks and not lose much battery power. So Barbara went for her workout and I headed home. Going home, I discovered a full charge means on flat surfaces . There were 3 hills going home. I made it up the first hill slowly but on battery. By the second hill, I was officially out of battery power. I’m desperately scooting with my legs to beat the band, to no avail (surprised?) . I have to call Earl to come get me--did I mention he had fractured his leg and was on crutches? “I’ll be right there with the van,” he says. But when he went out, the van battery was dead ...