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Thats good. Does sound like a calibration issue then which is hopefully now resolved.

How did it end up?

I've just watched the video - strange. Personally I've never found a discrepancy between St unlocker and the bike display (and I have the exact same bike as you!). Have you tried charging the battery in the bike to see what happens? If its a new battery it may also need calibrating with a full...

Are you using a normal shimano battery charger and measuring the charge voltage from that? Or a 3rd party charger?

Many thanks for the excellent writeup. Have you tried it with an internal E8035 per chance?

Is that because of the physical mount or the the electrics?

Have they done them before? I'm sure someone else on here tried it and found out it wasn't possible as the BMS would break when battery power was removed? The issue could be from poor cells rather than the BMS though, and the actual issue of degradation may not be as bad as reported by the BMS...

My understanding is that the shimano battery BMS will indeed 'brick' itself if you remove power such as when trying to re-cell, but the battery doesn't need to communicate with the motor via can bus to work. To wake it up it reduces the resistance on one of the communication pins to the 0v line...

Was that a claim against the supplier if its possible to say?

It shouldn't do. If you just read the information and don't change any of the settings it is very unlikely they can tell you have used the app. I've had a successful warranty claim after changing and then setting back settings. Like everything there are no guarantees, but I would say you're...

Normally the ST Unlocked app

May I ask how you went about getting the replacement agreed? And was that in the UK?

Interestingly, I've just had a new motor in which has later firmware installed and the battery is now showing 89% health after 60 cycles when it was showing 79% before...

Did you go directly to madison, or through your LBS? My LBS doesn't have a version of software which can see the battery degradation and when I spoke to madison, they said speak to the LBS as they won't deal with the public directly...

Thanks for the detailed explanation. I wasn't sure if there were more chips on the back of the board. I'd be surprised if they used a dedicated chip for the BMS - ASICS are usually far more expensive than a micro processor and less flexible. I could of course be wrong, but just strikes me as...

Would also be very interested in what you're upto.

Thanks! Does that mean that the BMS is a separate circuit to that for the communication to the bike / charger?

Very interesting, and good work! Strange that enough of the BMS is working to be able to monitor and report battery state, but not communicate correctly with the charger. Have you thought about shorting the blown fuse to see what happens?

Unfortunately its not quite as simple as that (wish it was). Really, you want a stable fixed resistive load and then measure voltage and current over time to give you the power output. Unfortunately the battery outputs are electronically switched which makes that very difficult to do. I would...