What is the Mitsubishi i-MiEV’s battery degradation rate?

I recently bought a used Mitsubishi i-MiEV. The previous owner said they had replaced the battery a year or two ago, so I was wondering how long I can reasonably expect it to last before it stops holding a decent charge. What is the Mitsubishi i-MiEV’s battery degradation rate?

Andrew Biro · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
As one of the first mass-produced electric vehicles, the Mitsubishi i-MiEV battery degradation anywhere from 3.10% to 3.75% per year.
The Mitsubishi i-MiEV has a battery warranty of 8 years or 100,000 miles (whichever comes first), so you can reasonably expect a 25% - 30% drop in charge capacity over the course of your battery’s lifetime.
Of course, the rate of battery degradation for any vehicle—be it a Mitsubishi i-MiEV or a Tesla Model X—largely depends on the driving conditions the vehicle is regularly subjected to and the driving/charging habits of the person who owns it.
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