Would be very interested in the feed in figures. As you said these numbers may be a guide but also might be meaningless. A real test would be to ride a set distance with as many things being equal as possible from a new battery and then at various points in time do exactly the same ride as your charge cycle count increases. If for example the ride is generally flat on eco, tyre pressures at x and all up weight of y and similar wind conditions, temp.etc. that would be a truer test of what distance is achieved and then reduced by after say 25 and 50 charge cycles. I wish I had thought to do this from new ...ultimately it's the reduction in range I care about over time vs some % figure a BMC is returning. I also wonder how accurate that number of cycles figure is as well??? Who actually has monitored that? I have two 8010 external 504wh that I rotate between and not in any set pattern. They are discharged to varying amounts depending on the rides I do. Sometimes battery 1 will be taken right down to 1 bar. I then swap to battery 2 and may only use 1 or 2 bars for the day. So a real mix of discharge amounts. I take the batteries to full charge and let the charger auto shutdown always. So how is it unless totally lucky that after approx 2.5 years 7411 kms, that battery 1 shows 90% and 52 cycles and battery 2 shows 90% and 51 cycles!! For similar offroad rides I still seem to get roughly the same distance from both batteries and not that different from when new...I think the drop off is less linear than from new however.I think its worth remembering that we still don't know if the reported values of battery health are accurate or not.
I've been tracking the input power to charge the batteries for a while now, and think I have an accurate method down. It seems like there is quite a difference in capacity between a new battery i have and one with 50 cycles. I want to gather more data before showing my results though.
That is pretty poor IMO. Out of interest, was that Shimano (Madison) who asked for that, or the LBS do you know?LBS got back to me and no warranty for internal 504wh battery at 80% 60 cycles after 11months from new, they want me to record rides and battery state after these to prove my range is down
This is Page 19 of Shimano Steps Service Manual that states 80% battery health after 500 charge cycles, show it to your LBS and have Shimano honour their statement in their own documentation.LBS got back to me and no warranty for internal 504wh battery at 80% 60 cycles after 11months from new, they want me to record rides and battery state after these to prove my range is down
Again I will ask the same question: what is exactly being measured and how is it measured.