http://www.greencarreports.com/news/1078138_toyota-hybrid-battery-replacement-cost-guide suggests that Toyota Prius and many other hybrid batteries only rarely need replacement.
However, Honda IMA hybrid batteries (as used in Civic hybrids before 2012) tend to be failure-prone, according to http://www.consumerreports.org/cro/news/2014/02/honda-civic-hybrid-battery-reliability-gets-worse/index.htm (shows comparison of Honda Civic hybrid and Toyota Prius battery replacement rates in their survey).