I think you're out of luck.

I've not tried searching in earnest myself, but a quick search some months ago came across some very keen Germans who were asking the same question and the conclusion they came to was Yamaha commissioned a connector manufacturer to make a custom/modified part, which you can't buy off the shelf, and it also seems difficult if not impossible to even get the part off Yamaha.

Not good. Especially as its not a particularly robust plug in the first place :-(

 

I'm sure the thread still exists out there (complete with pictures and manufacturer details), if you want to search. Google translate will be your friend though

Thanks for that, excellent reply. I am currently doing building work at a place that does electronics and their guys didn't recognise the plug. Shame as they said they'd swap it for me if I found one.

Thanks for that, excellent reply. I am currently doing building work at a place that does electronics and their guys didn't recognise the plug. Shame as they said they'd swap it for me if I found one.

 

I'm starting to remember a little more about the thread. Don't quote me on this, but I THINK one of them managed to buy a different (off the shelf) version of the plug, and modify it slightly so it did actually fit the socket.

 

I initially looked, as my Wife's yamaha charger plug fell apart and I thought I'd have to get a new one myself. Then I found how tricky it was to get a replacement, so I revisited the 'broken' plug, and managed to put it back together again.

 

It may be the strange locking mechanism that they use that's the 'custom' bit.

keen Germans

 

https://www.pedelecforum.de/forum/index.php?threads/yamaha-reverse-engineering.39480/page-4

https://www.pedelecforum.de/forum/index.php?threads/yamaha-reverse-engineering.39480/page-4

Keen indeed! It may as well have still been in German for all I understood!

Keen indeed! It may as well have still been in German for all I understood!

 

Indeed. Reading the German Pedelecs forum is often humbling. Especially when what we seem to have here is mostly the Brexit thread ...

 

but whatever :-)

 

What you can quite easily get from that thread is the name of the plug manufacturer!

https://www.hirose.com/product/en/products/HR30/

Indeed. Reading the German Pedelecs forum is often humbling. Especially when what we seem to have here is mostly the Brexit thread ...

 

but whatever

 

What you can quite easily get from that thread is the name of the plug manufacturer!

https://www.hirose.com/product/en/products/HR30/

I admit I just drifted off..

Excellent work, thanks!

My own plug was broken when the bike was knocked over when left charging the battery on the bike at work. Whoever knocked the bike over never made themselves known to me although may not have realized that any damage had been done after righting the bike.

 

Ironically it was probably the fact that the plug locks in place that made it vulnerable to damage when the bike fell over. Part of the broken locking cap sheared off and remained lodged in the battery charging socket on the battery and remains there still.

 

Anyway I found that the plug could still be connected and the battery charged although no longer held and it could easily fall out.

 

I use a neoprene battery cover all of the time and when pushed down to partly cover the charging port this helps to hold the plug in place now. It can occasionally fall out now, but mostly works well enough.

 

I consider myself very lucky to have a room where I can leave my bike to charge at work and decided not to make a fuss about my broken plug. It did make me realize that the plug is definitely not the most robust design.

 

Another issue I had with my charger was that wires from the end that connects to the plug became frayed close to where the cable enters the charger inside the outer casing that led to a short circuit and loud bang and a dead charger. Luckily the fuse protected the charger and I was able to use insulating tape to effect a repair and after replacing the fuse it all worked again.

 

I carry my charger to work with me in my panniers and the connecting wires are wrapped around the charger to put it in a pannier and unwrapped to charge the battery when I arrive at work and this constant wrapping and unwrapping may not have helped.

Edited February 3, 20188 yr by georgehenry

Just got the NX Li Ion 36v 13Ah 468w Yamaha battery from Amazon and it is way more efficient in the real world than the 400w with the maths saying by 17%... Also, I can now sometimes carry the other one as a spare for long journeys... Early days but so far impressed and looking forward to some longer rides.

Check out Rosenberger magnetic connections which are becoming the ebike standard connector.

 

Tom

Check out Rosenberger magnetic connections which are becoming the ebike standard connector.

 

Tom

http://www.rosenberger.com/en/products/medical/magnetic.php

Yes definitely. So far so good I just hope it lasts. To be honest if it only lasted a year (which the warranty is for) then at that price I'd still feel it gave it's monies worth.

Hi Doomo, purchased battery from Allbatteries end of January, it came fully charged so I used all its charge and then recharged, bit now won't power the motor, and screen shows all the symbols then shuts down. Battery shows full charge on its indicator. Have you experienced any problems with yours?

Hi Doomo, purchased battery from Allbatteries end of January, it came fully charged so I used all its charge and then recharged, bit now won't power the motor, and screen shows all the symbols then shuts down. Battery shows full charge on its indicator. Have you experienced any problems with yours?

 

 

My same battery did exact same as you describe. It lasted 2 months, and then did exactly what yours does now.

 

Aaron

My same battery did exact same as you describe. It lasted 2 months, and then did exactly what yours does now.

 

Aaron

 

Hmmm. I wonder if its a problem with the main power connectors.

Did you take the battery on and off for charging a lot?

And what was the outcome - did you get it fixed replaced?

Hmmm. I wonder if its a problem with the main power connectors.

Did you take the battery on and off for charging a lot?

And what was the outcome - did you get it fixed replaced?

 

I'm in Australia, I ordered the battery from China. I charged it up a few times only. Back when it happened, I didn't know if it was the motor or the battery that was at fault. Its only that I found your posting that I realised we have the same problem. Screen shows all of its display for a few seconds, then turns off. I cant send it back, so I am stuck with it (impossible to send Li batteries, no one in Australia will handle big Li batteries)

 

Aaron

I'm in Australia, I ordered the battery from China. I charged it up a few times only. Back when it happened, I didn't know if it was the motor or the battery that was at fault. Its only that I found your posting that I realised we have the same problem. Screen shows all of its display for a few seconds, then turns off. I cant send it back, so I am stuck with it (impossible to send Li batteries, no one in Australia will handle big Li batteries)

 

Aaron

 

Don't you have the original battery? trying that should tell you if its the replacement battery or the motor.

Don't you have the original battery? trying that should tell you if its the replacement battery or the motor.

 

 

I bought the bike with me back from the USA, so had to leave the original battery over there (couldn't take it on the airline)

That's very annoying! If a local bike shop sells them they might be happy to let you try your battery out on one of their bikes? I haven't had such problems yet. The only thing Ive noticed is sometimes after a full charge it can be a bit down when it's put on the bike, like 94%. So there is definitely something slightly quirky I just don't know what. There doesn't seem to be any pattern to it.

I did think the battery was already showing signs of degrading capacity but after a few tests I came to the conclusion that I'm just riding a bit harder which is hammering the battery more.

That's very annoying! If a local bike shop sells them they might be happy to let you try your battery out on one of their bikes? I haven't had such problems yet. The only thing Ive noticed is sometimes after a full charge it can be a bit down when it's put on the bike, like 94%. So there is definitely something slightly quirky I just don't know what. There doesn't seem to be any pattern to it.

I did think the battery was already showing signs of degrading capacity but after a few tests I came to the conclusion that I'm just riding a bit harder which is hammering the battery more.

 

When you say 'full charge' - how do you know its fully charged? What do you wait for to know its finished?

That's very annoying! If a local bike shop sells them they might be happy to let you try your battery out on one of their bikes? I haven't had such problems yet. The only thing Ive noticed is sometimes after a full charge it can be a bit down when it's put on the bike, like 94%. So there is definitely something slightly quirky I just don't know what. There doesn't seem to be any pattern to it.

I did think the battery was already showing signs of degrading capacity but after a few tests I came to the conclusion that I'm just riding a bit harder which is hammering the battery more.

 

Yamaha Australia never got the batteries certified to import into Australia, so no Yamaha batteries here. That's why I got the same as yours aftermarket one from China. I tired lots of avenues before I got it from China, but it was my only option. In Australia we have Bosch and Shimano steps ect, just no Yamaha ebike systems at all.

 

Funny though, our poor bastard child cousin (New Zealand), does have Yamaha ebike motors/batteries. And they won't send from NZ to Aust (too many rules for sending Li batteries via sea cargo or air)

 

Aaron

When you say 'full charge' - how do you know its fully charged? What do you wait for to know its finished?

The green indicator lights on the top of the battery will flash when it is charging and they also indicate how charged the battery is (during charging) by the number of lights constantly on, e.g. one flashing only means the battery is between 0% and 20%, one constant and one flashing means between 20% and 40%, etc. 4 constant and one flashing means between 80% and 100%. Once the battery is fully charged all 5 lights should be on constantly and will remain on until the charger is unplugged.

.... 4 constant and one flashing means between 80% and 100%. Once the battery is fully charged all 5 lights should be on constantly and will remain on until the charger is unplugged.

 

Unfortunately, I don't think its quite that simple.

When any flashing stops and all five lights are lit, the charger circuitry is still drawing current for some time afterwards. Exactly how long, I'm not sure, but if you unplug as soon as the flashing stops, I imagine that either you haven't quite finished charging, or you're still in the balancing phase.

Buy a mains power meter, plug the charger in through that and keep an eye on the watts. It will slowly drop down to around 7w and then stay there (forever!). Once its there, then unplug.

 

Cheers

Unfortunately, I don't think its quite that simple.

When any flashing stops and all five lights are lit, the charger circuitry is still drawing current for some time afterwards. Exactly how long, I'm not sure, but if you unplug as soon as the flashing stops, I imagine that either you haven't quite finished charging, or you're still in the balancing phase.

Buy a mains power meter, plug the charger in through that and keep an eye on the watts. It will slowly drop down to around 7w and then stay there (forever!). Once its there, then unplug.

 

Cheers

 

That's quite interesting. I havent gone into that level of testing but I have tried leaving it plugged in for over an hour after the lights have gone constant, and also unplugging immediately after. Most of the time its 100% but sometimes it's under no matter what I do. It is bizarre and suggests there is some glitch in the circuitry of the aftermarket battery. The original battery has never done this.

That's quite interesting. I havent gone into that level of testing but I have tried leaving it plugged in for over an hour after the lights have gone constant, and also unplugging immediately after. Most of the time its 100% but sometimes it's under no matter what I do. It is bizarre and suggests there is some glitch in the circuitry of the aftermarket battery. The original battery has never done this.

 

There are some differences.

For one, the original battery causes the charger to terminate charge completely and the green LED on the charger will go out when its finished (on a 4A charger anyway). I really didn't like the fact that it didn't do this on the third party one hence I tested it. The last thing I wanted was to say leave it plugged in overnight and it keep pumping 4 amps into the battery!

As it turns out, I don't think it does this, so all is good, however whatever the mechanism is to switch off the charger, that doesn't work properly.

I use this to monitor the charge:

https://www.amazon.co.uk/Brennenstuhl-Eco-Line-Extension-Energy-Saving-White/dp/B01GLHLOG4/ref=sr_1_5?s=electronics&ie=UTF8&qid=1525798187&sr=1-5&keywords=Brennenstuhl+Eco-Line+Extension+Lead+Cable+Energy

Handy as I need an extension lead most of the time anyway :-)

 

Also, I have a feeling the 3rd party battery charges ever so slightly higher voltage wise, than the stock Yamaha one (or perhaps its a case of Yamaha slightly under volt their cells to give longer life). because the bike will register 100% for quite some time before it starts to drop under this figure when in use. So maybe the true 'full' figure is perhaps 105-110% compared to the normal battery. If yours is showing 90 something after coming off charge, id be thinking that it may very well NOT be fully charged.