I have a M3P that is almost 1 year old with only 4,000 miles and is showing 20 rated miles degraded at 100% charge (279 vs 299 new). I understand that up to 10% degradation is normal in the first year. However that is usually after one year and 20-30 thousand miles on the battery.
My question is does the mileage have a big effect on the first years battery degradation? Or is it solely the passing of time? Should one expect 10% degradation after one year whether they drive 1000 or 50,000 miles in that time?
My question is does the mileage have a big effect on the first years battery degradation? Or is it solely the passing of time? Should one expect 10% degradation after one year whether they drive 1000 or 50,000 miles in that time?