ChainGun,
I'd be interested to hear your story of how the battery issue progressed. Does your SOC indicate 60%, or does it indicate 100%, but you noticed decrease in range? Did this happen fairly abruptly, or was it a slow degradation? Did they give you any clues about how they analyzed the battery? I've read that they determine loss of capacity by analyzing battery logs. Since we have the ability to look at the logs ourselves, I'm curious to know what they look at.
1. Last week I got a replacement battery. Dealer said it's used but less than 1000 KM and it's 9.8, better than my old 9.4. Performance wise, I'm happy. Not sure I made the best decision (I could have waited for the new battery) but I was sick of riding the train to work and back.
2. The degradation took a few weeks. The battery indicated 100% but I was starting to get speed-capped after less than 80KM (normally the range is 120 KM). Had some real frightening rides where I keep decelerating on a highway. On the day I returned the bike to the dealer, battery said 49% remaining on a ride which normally left ~70% available. Since I live on a hill, 49% at work means I can't make the ride home.
3. I sent them logs but Zero don't share the results or findings with you, only with the dealership.
All in all, I'm satisfied. I'd be happy to answer additional questions.