I bought my CT200H in 2012 and it is now 2021. After 9 years, my battery has died. Through its lifetime the dome light inside was left on on separate instances over its 9 years and the car needed a jumpstart, total 3 times. The last time was the one that seemed to kill the battery last night. After jump starting the car, it seemed to run fine and i could drive on the highways. the next day, the car wouldn't start, the battery seemed to die again. Battery replacements estimate 4800$ now (inflation maybe?). In any case, battery replacement is definately a real thing to consider when buying these hybrids. I suppose Lexus and Toyota perfectly timed their warranty for batteries at 8 years as they knew that was near the lifespan of them anyways...