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Don't ask for a diagnostic. Just tell them the battery doesn't work so they need to sort it out under warranty. there should be absolutely no cost. You paid for that when you paid for the bike. You paid for the bike plus, its warranty and the warranty on the battery. That was the contract you...

Bosch batteries have warranty for two years. The shop will fix it or give you a new one.

Connecting with wrong polaity is normally terminal for the controller. A few people have tried repairing, but I don't know anybody that was successful. In principle any 36v brushless controller will work. It's not possible to advise further without knowing what you have. As always, you guys...

Some cables and stuff from here: https://www.decathlon.co.uk/browse/c0-sports/c1-cycling/c3-electric-bike-spare-parts/_/N-1jt3wt8

Why does it have to be near London? If you go to poorer areas, pemises and salaries will be cheaper and you might be able to get grants to help you start up.

Not a lot to go on. Is it E-motion, Emotion or BH Emotion, and which model?

Is the rim central to the frame? Are the spokes tight?

It might help to tell us what bike you have.

You normally only have to flip the magnet disc to get it working in the right direction. When you swap sides, the disc has to be flipped to give the same output pattern.

Your photos show that there is a comms link to the battery, so your battery probably won't work with a different controller. It's the controller that fixes the maximum speed, though sometimes, if you know the secret method, you can change that parameter through the LCD in advanced settings...

One thing you can try before giving up on the controller: Press out every other magnet to convert it to a 6 magnet disc. That's worked for me a couple of times with 12 magnet discs.

It's knackerd. I doubt that it will catch fire, but something is seriously wrong. I've had that a few times when I used to repair batteries - only with pouch cells, but I got the same smell with 18650s that I opened up to see what was inside.

I used mine for winter commuting for two years, 15 miles each way. I didn't have any problem with sweating, waterproofness or anything. The only problem was when the temperature was over 4 deg, it was too warm, so like DC, I unzipped it about half way down to let the cool air in. Underneath, I...

I'm pretty heavy and found them not to be too bad on hills. What sort of hills are you talking about? How heavy are you? Did you use the throttle?

I found the same with one of those yellow reflective jackets with the quilted lining: https://www.ebay.co.uk/itm/Premium-Hi-Vis-Visbility-Viz-Bomber-Padded-Jacket-Safety-Waterproof-Work-Coat-UK/184561757083?hash=item2af8bceb9b:g:DJ0AAOSwGJJfxopK

If the lights suddenly go out when it shuts off, it's probably a connection issue. If they ramp down quickly, it's probably that you're over-loading the battery Please give details of your controller. motor and battery.

Most of these things run off a USB power bank, which you can put in your pocket or anywhere else: https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=heated+pads+usb&_sacat=0 Make your powerbank from recycled ebike batteries. You can probably get dead batteries from...

Yes- just the three pess studs.

You said it yourself. with a Bosch-type system, the amount of power you get from the motor depends on how hard you pedal, so if you want more power, you have to pedal harder. With a cadence current control system, you can either choose the amount of assistance you want and then pedal with...

Snowboard helmets or BMX helmets. I fitted a flip up visor to mine https://www.aldi.co.uk/adult%27s-matt-black-ski-helmet-m-l/p/802443420704602?gclid=CjwKCAiArbv_BRA8EiwAYGs23GboSiNMxmc7Od465uXwJAQDnaseAcCFcBxg9UItqyLKvO07kVB7qxoCICUQAvD_BwE&gclsrc=aw.ds Something like this...