118,000 EV miles. 53 miles per charge. That's 2,226 full charge cycles. Sparkie travels an average of 66,000 miles per year (long commute) since 2011 (2012 model... 2011... 5 years).
That's more distance than most will do with their dino cars.
Proper thermal management is done on these batteries because GM did their work: they have the largest battery lab.
The Volt's Gen2 battery is 18.5kw but only about 14.5 is available for driving. The remainder is used for thermal management and avoiding deep charge cycles, which is really what destroyes life expectancy of Li-Ion batteries. And that's why they last long.
Gen 1 used different battery capacities but still had that ~20% thermal overhead. Also, unlike laptop and phones, these batteries are liquid-cooled with their own glycol, 5-channel cooling system (Tesla only has a single-chanel system).
Disclaimer: I both a Gen2 Volt and a CSRT4.
My Volt will rot to the ground before I have to worry about the battery.