Hello Everyone I have a 2014 Prius (178,000 miles) that I personally installed a new hybrid battery last year. I purchased that battery from a Toyota dealer's parts department so the battery should last for many years and miles to come. Unfortunately, that 2014 Prius was in an accident and we have decided to sell it to a wrecking yard. I have 3 other Prius's that have the original hybrid batteries in them and we are going to swap this 1 year old battery into one of those cars. 2014 (178,000 miles) Wrecked ( 1 year old hybrid battery) 2011 (119,000 miles) 2013 (97,000 miles) 2014 (112,000 miles). Common sense tells me to put the donor battery from the wrecked 2014 into the 2011, since it has the most miles and most age on the factory hybrid. Which car would you swap the 1 year old hybrid battery out with. 2011, 2013 or the other 2014? Thanks for your thoughts