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So if we agree that assisted bicycles encourage more cycling, do we also agree that Environmental considerations are higher now, than in the 1980s - Air pollution caused by the massive increase in car usage, congestion etc. Also that with the spreading on the 20mph limit for urban areas it...

just a thought - What was the reason for the concession to allow ebikes to operate without bureaucracy? was it to encourage cycle usage?

Well I purchased the cheapest ebay battery I could find (48v 10a) so I could substitute my battery to test the system. Did a 10 mile ride with the new battery no problems. Switched back to original battery - managed 1 mile before power cut off as before. Then repeated switch to 48v then back to...

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0222905 Long but interesting article, examples used were motorbikes but the principle remains the same. The conclusion is that a significant proportion of drivers simply forgot seeing the bike, so drive defensively.

https://www.pedelecs.co.uk/forum/threads/how-do-i-calculate-watts-used-per-mile.31067/

I have had a discussion with Jimmy at eBikebatteries.co.uk and decided that as the cells remain balanced its unlikely they are the problem. The cost of investigating the BMS & welds is about half the cost of a new battery, let alone any new parts. I have found some helpful posts...

many thanks for everyone's helpful replies - I am going beyond my comfort zone/ability to remain safe when investigating a potentially dangerous battery. I have learnt a lot, but do not wish to make an error & short something whilst my eyes and hands are trying to check things out. So, assuming...

Solder contacts feel firm where should I place the meter probes, on the thick black & yellow wires as the solder joints are exposed on the BMS & flip the on/off switch to see if the voltage changes?

I checked the battery using the probe on the sense black wire & each white wires. So cumulative voltage 3.9v 3.9v 7.8v 3.9v 11.7v 3.9v 15.6v 3.9v 19.5v 3.9v 23.3v 3.8v 27.2v 3.9v 31.1v 3.9v 35.0v 3.9v 38.9v 3.9v 42.8v 3.9v 46.7v 3.9v 50.6v 3.9v 54.4v 3.8v So difference between cell groups is a...

Well this morning I thought to check if the fault had cleared itself overnight, before disturbing anything. Voltage - same as last night Brake cut offs work & shown on display So took it for a ride, throttle only, to maximise load, got 100 feet before power cut off. Returned home, switch on...

Ok- thanks that is something I never knew.

Ok - yes the display went off & would only turn back on when I turned the battery off/on & then the handlebar on switch. But does not the battery wiring go into the controller then the display, so I'm no further forward in narrowing down the fault

Brake cut outs on both brakes, when I was coasting home & used the brakes the display showed the brake symbol correctly, but I will unplug & refit & check that display shows they are working

Not yet, I was going to try that tomorrow. I was hoping to limit the things to check out

battery purchased January 2018. Number of charge cycles (counting four charges from 75% to 100% as I cycle) is 59. Battery 52v17.5ah using Sanyo NCR18650GA 3.7v 3450mAh cells 14S5P & 30A BMS Note March 2018 battery discharged to 43.9v in error since then its been charging to either 90%...

when I left it was 58.8v it had dropped to 54.5v after 24.5miles. I was watching the display when the power cut off, it showed the same voltage before & after I switched it back on, no voltage sag.

today the power cut out on mile 10 of 15. On return journey sometimes it only lasted seconds. Suggestions please to allow me to identify the problem. On the way back I identified the problem could be 1- Battery (cells or BMS) 2-wiring from battery to controller 3-Controller 4-wiring from...

https://www.sciencedirect.com/science/article/pii/S259019821930017X this is the study referred to in the article

I used two different types of SKS full length mudguards & joined together, as neither were long enough to stop road spray. I understand that you can buy front fork brackets, but at the time I did not realise that & simply went to the local toolstation for plumbing parts.

add to your existing home insurance