2009 Toyota PriusEnlarge Photo
Any battery that needs replacement within the warranty period will be replaced at no cost.
It's worth noting that there is a growing network of third-party hybrid specialty shops that either repair or replace batteries, often at a lower cost than at a dealership.
If a car is still in warranty, it's advisable to have the work done at a dealership, to ensure the work is fully warranted and performed by a factory-trained technician.
Little to worry about
Whatever you think of the prices above, it's worth reiterating that replacement batteries are the exception rather than the norm.
The vast majority of owners will never incur the cost of a replacement unit, as proven by any number of Priuses used as taxis for as many as 300,000 miles.
For the few owners who do require a pack replacement, the prices above give you an indication of what to expect--and the reality isn't quite as dramatic as many people suspect.
If your car is out of warranty, however, check out those third-party hybrid-specialty shops.
[Research assistance for the June 2016 update provided by Bozi Tatarevic]