The battery packs for the 85 are warranted for 8 years. The current cost of replacement is estimated at $34K, so if you drive 100K miles, you need to add 34 cents/mile to your fuel costs to amortize your battery.
Tesla — through technological innovation and $1.3 billion from the state of Nevada — hopes to bring the cost of battery replacement down to $12K within that 8 year period, bringing the battery replacement cost down to 12 cents/mile.
That’s another thing you don’t hear about and reason # 3,216 that I’d stay away from any hybrid.