https://www.theguardian.com/technology/shortcuts/2017/sep/11/tesla-hurricane-irma-battery-capacity >The electric-car giant gave customers a lifeline by remotely boosting their vehicles’ battery capacity. But this act of kindness also highlighted that it had been selling identical cars at different prices >Tesla drivers who fled Hurricane Irma last weekend received an unexpected lesson in modern consumer economics along the way. As they sat on choked highways, some of the electric-car giant’s more keenly priced models suddenly gained an extra 30 or so miles in range thanks to a silent free upgrade.