Today was my first chance to test my battery distance. 2013 Volt, 100,000 Km (62,000 mi.), 23C (73F), fan only, 90 to 100 kph, speed limit is 90 kph (56 to 62 mph) in heavy traffic on Trans Canada Highway so no cruise control, mostly flat with rolling hills (Vancouver Island) with just a bit of urban driving. Got 65 Km. (40.3 miles). I'd say the battery is in good condition.