javensbukan wrote:What would one expect for battery fade of a MY 2012 I-MiEV with 27000 km on it?
Loss of battery capacity can be all over the place. High miles can be a big part, but so can how the car was treated. Many 2012's didn't sell very well, so they ended up on a $99 per month lease program after they had been languishing on dealers lots for a year or more and many of those sat around with the battery fully charged, which is the absolute worse
thing you can do to a lithium battery. Unfortunately, many of those cars were the higher priced Premium SE's with Nav, ChaDeMo and all the bells and whistles - Because they were about $4K more expensive than the 'regular' models, many of them just didn't sell. A year of sitting around fully charged can do more damage to the battery pack than 75,000 miles of driving the car everyday - I own 2 of those former leased cars, both with fewer miles than the third car we bought brand new which I seldom ever charged to 100%. The difference in the battery packs is between 15 and 20% - Our original SE will go about 20 miles farther than the other two
That said, a good buy on a car with only 45 or 50 miles of range can still be a great deal if that works for your daily commute. Once the battery has been hurt to that degree, it doesn't seem to get much worse, at least not very quickly. My daily driver will only go 50 miles if I really baby it, but for me, 50 miles might be 3 or 4 days of commuting, so no big deal. I could easily get 70 miles per charge from our original car, maybe 80 miles with careful slower speed driving. If you're looking for a long range car, none of these are that anyway
Mitsu warranties the battery pack for 10 years (at least in the USA they do) but loss of capacity isn't covered by the warranty - You'll only get a new battery under warranty when a cell or two fails and the battery no longer will charge to 100% . . . . whatever 100% for that battery is - It might only be 30 AH, compared to the 45 or so AH it had when it was new . . . . still, it charges to 100%, so Mitsu will say there's nothing wrong with it
A Canion check on the amp hours is the only definitive way that I know of to tell the health of the pack in any used iMiEV you're looking to buy