Help! Jorvick 24 trike / throttle

Mee

Pedelecer
Aug 13, 2025
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Standard Tigershark battery that you can buy anywhere. I gave a link in the other thread.

BTW I've never seen or heard of one of those batteries leaking. In the old days, some cells would leak, but not enough to come out of the battery. I suspect that water has got in and is finding its way back out. In that case, the battery might be fixable if you have the competence to work a screwdriver and voltmeter.
Just to clarify, if I buy a new battery does the mount have the controller in it, and so I just need to make sure that the controller works with my motor and wiring?
 

Mee

Pedelecer
Aug 13, 2025
26
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When you leave a battery standing for a long time it can go out of balance because in many cases the BMS needs power to check whether the battery is still OK to give power. Sometimes, it takes the power from only one of the ten cell groups, so that one goes down to a level that prevents the battery from giving much power or capacity. The only way to know is to measure. You can get a clue from the outside by operating the charger until the light goes green, then measure the battery voltage on its main terminals. A healthy battery would be around 42v. Anything below say 41.5v should be given some attention to re-balance it. One that's been left for a long time might be as low as 39v.
How does one go about rebalancing it? is it worth me doing this rather than buying a new one? I don't have a charger so will have to buy one and don't want to spend the money on this if the battery is no good/
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
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How does one go about rebalancing it? is it worth me doing this rather than buying a new one? I don't have a charger so will have to buy one and don't want to spend the money on this if the battery is no good/
Sometimes you can re-balance by leaving it on charge for a long time. I don't understand what your problem is. I'm totally confused. If you don't have a charger, how do you know that the battery has enough charge in it to work?

It's really difficult to give specific advice. You need to charge up the battery and measure the voltage. Depending on the voltage, you might need to open the case and do some measurements inside. Those measurements will indicate what you need to do after that. You need to remove the battery and show us photo. The photos you showed us don't add up.
 

Mee

Pedelecer
Aug 13, 2025
26
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My problem is I bought second hand, it was advertised as without a charger but fully charged After I bought it I was also told it had no keys, it had half charge and is incapable of climbing even a slight incline, as I found on my journey home up 715 feet, most of which I had to push it and its very heavy.

I contacted Jorvik to ask what could possibly be making it so difficult to ride even with pedal assist and they said it could be the battery. The battery appears to be leaking and I am getting conflicting information about whether it is worth keeping or not and no charger to charge it or keys to remove it, so I can break the lock, but then need to replace that too.

I have little techniacal knowledge and although I am capable of learning I also have limited tools, no money and a credit card debt stacking up with everything I buy. So I can buy a charger to charge it and see if it is working, or get it repaired, but I am trying to balance the probability with the cost that I just can't afford to waste any money on a possibility at the moment. So I am trying to determine, if I can buy a compatible battery that will work with the system controller of the Jorvik, becauseJorvik state there battery bars have the controller in them, and if using a higher voltage and ah battery will help with the performance of the trike at a all.

As you mentioned balancing I wondered if that was a viable option rather than replacing the battery as if I could get someone to do it as I haven't a clue, but if it is speculative then I can't afford the money to speculate I need to be sure that whatever option I take is going to work.

I'm asking questions as I'm being told things, Its a bit of a mine field of information and I am trying to wade my way through it to find the best possible solution with the least cost and no risk of whatever solution I spend money on failing.

I have a trike sold as fully working, that doesn't work, took it for a service to the local bike shop and he just rode it round the car park, adjusted the break lever while out of sight, then said, I think that is it, that's as good as it gets and pretty much refused to service it.

So now instead of the back brake rubbing on the disc, it doesn't work, I tried adjusting the brake myself but the bolt is ceased, it hasn't been serviced and needs it to determine how much fault is mechanical I can buy a charger from Jorvik , but there's no point if the battery is shot. but mechanics aside there is an electrical system I know nothing about, and don't have the money to speculate.

It's not my hobby, I bought this to help me haul shopping and hopefully the growing pile of rubbish in my garden that needs to be taken to the tip, as I don't have a car, and what I have ended up with after spending money I can't afford, because of unscrupulous seller , misadvertising by Jorvik and for some unknown nefarious reason of local spite is something I can barely use and is possibly dangerous in many ways.

I just need to get it working for as little money as possible, and with as much power as possible because I live on the top of a very steep hill 705 ft above sea level and the only way out of town is to go down one or more steep hills and back up them again. And I need to repair it with little knowledge, no money a few tools and a limited space in my garden to manoeuvre, the very big and heavy trike.

At the moment I don't know :

If its worth getting the battery repaired.
If it's worth buying a charger.
should buy a new battery and charger.
What V and Ah is best for the new battery and if I increase them form36/16 will work without frying the motor and controller.
Will the controller of a new battery will work with Jorvik system, as they state the controller is in the battery bar, and I don't know and can't find the information if compatible also have this and it replaces the Jorvik one or if the compatibles work for a controller placed elsewhere on the system.

I lost , sorry for all of the questions but I really don't know what to do for the best!
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
9,162
4,092
Telford
My problem is I bought second hand, it was advertised as without a charger but fully charged After I bought it I was also told it had no keys, it had half charge and is incapable of climbing even a slight incline, as I found on my journey home up 715 feet, most of which I had to push it and its very heavy.

I contacted Jorvik to ask what could possibly be making it so difficult to ride even with pedal assist and they said it could be the battery. The battery appears to be leaking and I am getting conflicting information about whether it is worth keeping or not and no charger to charge it or keys to remove it, so I can break the lock, but then need to replace that too.

I have little techniacal knowledge and although I am capable of learning I also have limited tools, no money and a credit card debt stacking up with everything I buy. So I can buy a charger to charge it and see if it is working, or get it repaired, but I am trying to balance the probability with the cost that I just can't afford to waste any money on a possibility at the moment. So I am trying to determine, if I can buy a compatible battery that will work with the system controller of the Jorvik, becauseJorvik state there battery bars have the controller in them, and if using a higher voltage and ah battery will help with the performance of the trike at a all.

As you mentioned balancing I wondered if that was a viable option rather than replacing the battery as if I could get someone to do it as I haven't a clue, but if it is speculative then I can't afford the money to speculate I need to be sure that whatever option I take is going to work.

I'm asking questions as I'm being told things, Its a bit of a mine field of information and I am trying to wade my way through it to find the best possible solution with the least cost and no risk of whatever solution I spend money on failing.

I have a trike sold as fully working, that doesn't work, took it for a service to the local bike shop and he just rode it round the car park, adjusted the break lever while out of sight, then said, I think that is it, that's as good as it gets and pretty much refused to service it.

So now instead of the back brake rubbing on the disc, it doesn't work, I tried adjusting the brake myself but the bolt is ceased, it hasn't been serviced and needs it to determine how much fault is mechanical I can buy a charger from Jorvik , but there's no point if the battery is shot. but mechanics aside there is an electrical system I know nothing about, and don't have the money to speculate.

It's not my hobby, I bought this to help me haul shopping and hopefully the growing pile of rubbish in my garden that needs to be taken to the tip, as I don't have a car, and what I have ended up with after spending money I can't afford, because of unscrupulous seller , misadvertising by Jorvik and for some unknown nefarious reason of local spite is something I can barely use and is possibly dangerous in many ways.

I just need to get it working for as little money as possible, and with as much power as possible because I live on the top of a very steep hill 705 ft above sea level and the only way out of town is to go down one or more steep hills and back up them again. And I need to repair it with little knowledge, no money a few tools and a limited space in my garden to manoeuvre, the very big and heavy trike.

At the moment I don't know :

If its worth getting the battery repaired.
If it's worth buying a charger.
should buy a new battery and charger.
What V and Ah is best for the new battery and if I increase them form36/16 will work without frying the motor and controller.
Will the controller of a new battery will work with Jorvik system, as they state the controller is in the battery bar, and I don't know and can't find the information if compatible also have this and it replaces the Jorvik one or if the compatibles work for a controller placed elsewhere on the system.

I lost , sorry for all of the questions but I really don't know what to do for the best!
Nobody can answer those questions without testing anything. You say the battery was half-charhed. How do you know it was 50% and not 10%? The cells are not leaking. I've dealt with hundreds of ebike batteries, and none have leaked stuff out of the case. If cells leak, you get a very pungent sweet smell that you can smell from several feet away.

A charger can be bought for £5.
If you post where you live, maybe someone can lend you a charger.

One thing I don't understand: If you bought it with some charge in the battery, the previous owner must have had a charger. Can't you borrow it from them to test your battery.

Even if you don't have tools, surely, you know somebody that does have them and can help you measure the voltage, etc.
 

Mee

Pedelecer
Aug 13, 2025
26
0
Nobody can answer those questions without testing anything. You say the battery was half-charhed. How do you know it was 50% and not 10%? The cells are not leaking. I've dealt with hundreds of ebike batteries, and none have leaked stuff out of the case. If cells leak, you get a very pungent sweet smell that you can smell from several feet away.

A charger can be bought for £5.
If you post where you live, maybe someone can lend you a charger.

One thing I don't understand: If you bought it with some charge in the battery, the previous owner must have had a charger. Can't you borrow it from them to test your battery.

Even if you don't have tools, surely, you know somebody that does have them and can help you measure the voltage, etc.

When I bought it the indicator on the LCD screen showed half charge. It's now empty but can still use it for lights. The seller sold it without the charger stating it was lost and also after I bought he said he lost the keys. He also said it was fully working which it is not and I told him to come and collect it and give me a refund for which I got a lot of verbal abuse and he blocked me, so no can't borrow the charger form him.

There is white powder on the base of the battery bar, I looked up online what it might and the answer is the cells are leaking.

I have some tools but not everything I need, some are cheap to buy some not. I don't know anyone that I can ask for a loan or help.

Thanks for the link for the charger, that is helpful, is that for a single pin? difficult to tell from description and image.

Thanks, you time and information are much appreciated.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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No charger and no keys often mean it is Hooky and has been nicked, pointing to stolen goods.
 

Mee

Pedelecer
Aug 13, 2025
26
0
Nobody can answer those questions without testing anything. You say the battery was half-charhed. How do you know it was 50% and not 10%? The cells are not leaking. I've dealt with hundreds of ebike batteries, and none have leaked stuff out of the case. If cells leak, you get a very pungent sweet smell that you can smell from several feet away.

A charger can be bought for £5.
If you post where you live, maybe someone can lend you a charger.

One thing I don't understand: If you bought it with some charge in the battery, the previous owner must have had a charger. Can't you borrow it from them to test your battery.

Even if you don't have tools, surely, you know somebody that does have them and can help you measure the voltage, etc.

On the charger page.
The pins are stated as 5.5 x2.1, and another I found is an option of that or 5.5 x 2.5, how do I know which one for my battery? I measured the diameter it it 5mm. Can't find any other info on which size single pin I need.
 

Mee

Pedelecer
Aug 13, 2025
26
0
Found this one with two pin sizes. the battery port measures 5mm but could possibly be 5.5mm , my tape measure is not so fine. Is this a standard size? will 5.5 mm fit the battery port? Thanks.

64028
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
9,162
4,092
Telford
When I bought it the indicator on the LCD screen showed half charge. It's now empty but can still use it for lights. The seller sold it without the charger stating it was lost and also after I bought he said he lost the keys. He also said it was fully working which it is not and I told him to come and collect it and give me a refund for which I got a lot of verbal abuse and he blocked me, so no can't borrow the charger form him.

There is white powder on the base of the battery bar, I looked up online what it might and the answer is the cells are leaking.

I have some tools but not everything I need, some are cheap to buy some not. I don't know anyone that I can ask for a loan or help.

Thanks for the link for the charger, that is helpful, is that for a single pin? difficult to tell from description and image.

Thanks, you time and information are much appreciated.
When the indicators show half-charge, the battery is nearly empty, so that's your problem.

You shouldn't take any notice of what people on the internet say, when you don't know who they are nor what they know.

I agree with the others. Without a charger and keys, it's almost certainly nicked.

You still didn't say where you lived!! Is that because you think it's nicked too.
 

Mee

Pedelecer
Aug 13, 2025
26
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When the indicators show half-charge, the battery is nearly empty, so that's your problem.

You shouldn't take any notice of what people on the internet say, when you don't know who they are nor what they know.

I agree with the others. Without a charger and keys, it's almost certainly nicked.

You still didn't say where you lived!! Is that because you think it's nicked too.
The battery is completely empty now> I don't believe everything people tell me online but I do ask questions and research and do my best to verify, which is why I am asking questions here. I searched for why there is powder on the bar and the answer came back from many sources that it is leaking.
Jorvik said the failure on hill may be due to problems with the battery.

Apparently its not stolen as when I got it home after buying, in what unfolded as a very dodgy situation, and being told there were no keys either, I reported it to the police who weren't that interested in finding out and I had eo push them a bit and keep calling and ended up having an argument with the woman at the call centre who said she couldn't allow me to talk when I was asking questions and talked over me claimed I was not listening to her being uncooperative and then put the phone down on me. She did the same when I called back to complain, and got her again! So apparently it's not stolen as far as they are concerned and that's as much as I know because they did not call me back as I asked.

Many people don't advertise where they live or their names for many reasons of security or choice. Why would you think I was trying to hide something anymore that anyone else on the forum who doesn't give their name and address and information, amongst strangers as you have just posted, I don't know who they are.

I just need to know it the charger connector I posted will fit the battery I have. And if I find the battery I have is no good and leaking which makes them dangerous, if I buy a new battery, do they have a controller in the battery bar that will work with the Jorvik? I am not clear as to if the Jorvik with its controller in the bar, means no other battery will work with it or if the others also come with a controller in the bar the is universal or work on the premise that other bikes have the controller elsewhere.
 

Mee

Pedelecer
Aug 13, 2025
26
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No charger and no keys often mean it is Hooky and has been nicked, pointing to stolen goods.
And Idid ask this when I bought it and they said not.
but they also said it was fully charged and working but it isn't, so I reported and verified as best as I could. funny how everyone gets out of their prom about possible theft and likely the police would be nasty shits if it was stolen but they weren't interested in the slightest about looking into it or letting me know what they found.
 

matthewslack

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Nov 26, 2021
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The charger you showed should be fine, it has both 5.5/2.1 and 5.5/2.5 connectors. The 5.5 is pretty standard, and you can check whether 2.1 or 2.5 is right by trying the 2.1 first: it won't go in if it is wrong as the pin will be too big for the hole.

You need to be careful charging, as battery may be bad and history is somewhat unknown. Do it outside and don't leave unattended, don't leave it on overnight. Will take 8 hours or more from flat as the battery I think was said to be 15.6Ah and the charger is 2A.

If it charges to full, then you'll be able to see if being flat was the problem. But if long-term stored without being looked after, high chance it is no good.

If you break the battery lock it shouldn't break anything else. Ideally you end up with a 'lock' that holds the battery but turns with a screwdriver. Remember a new battery comes with a new mounting plate, and new lock.

The controller might be mounted in the battery mount, but the opposite end to the lock. There is a recess there in some battery mounts, large enough for a small controller. I don't know how it will be mounted: I assume removable but I don't know.
 
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Nealh

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If it was stolen , I very doubt if plod would even know.
To buy a used battery from someone who has no key or charger, sounds very very dodgy as you have also intimated at (as a dodgy situation) !!!!
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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We only ask for a location as it may help in an offer from a forum member to look at your battery, to see if it is recoverable/repairable.
Also this a legit premier UK EAPC forum and not some dodge pot site like fakebook that gives out duff info, if someone does they soon get called out by other members.
 
Last edited:

Mee

Pedelecer
Aug 13, 2025
26
0
The charger you showed should be fine, it has both 5.5/2.1 and 5.5/2.5 connectors. The 5.5 is pretty standard, and you can check whether 2.1 or 2.5 is right by trying the 2.1 first: it won't go in if it is wrong as the pin will be too big for the hole.

You need to be careful charging, as battery may be bad and history is somewhat unknown. Do it outside and don't leave unattended, don't leave it on overnight. Will take 8 hours or more from flat as the battery I think was said to be 15.6Ah and the charger is 2A.

If it charges to full, then you'll be able to see if being flat was the problem. But if long-term stored without being looked after, high chance it is no good.

If you break the battery lock it shouldn't break anything else. Ideally you end up with a 'lock' that holds the battery but turns with a screwdriver. Remember a new battery comes with a new mounting plate, and new lock.

The controller might be mounted in the battery mount, but the opposite end to the lock. There is a recess there in some battery mounts, large enough for a small controller. I don't know how it will be mounted: I assume removable but I don't know.
Thanks, that's very helpful.

Can you clarify about the controller? Jorvik sayits in the battery mount. compatible sellers, state type of compatible controller as X something. What I don't know is, if the compatibles come with a controller in the bar, that works with your system if it is X something, or if the controllers on other bikes and trikes are placed elsewhere and the compatibles will only work on these models and not the Jorvik with the bar mounted controller?
 

matthewslack

Esteemed Pedelecer
Nov 26, 2021
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Thanks, that's very helpful.

Can you clarify about the controller? Jorvik sayits in the battery mount. compatible sellers, state type of compatible controller as X something. What I don't know is, if the compatibles come with a controller in the bar, that works with your system if it is X something, or if the controllers on other bikes and trikes are placed elsewhere and the compatibles will only work on these models and not the Jorvik with the bar mounted controller?
All I can say is that the bottom part of some battery mounts has a cavity which is large enough for the smaller controllers.

Putting the controller there is neat and tidy. But I don't have specific Jorvik knowledge.

When you say 'bar mounted', I think you might be confusing two different things. The 'controller' is usually an aluminium case with lots of cables going in and out.

The thing on the handlebars with switches and indicators of power and battery state and speed is NOT the controller: it is generally called the 'display', or LCD or LED for some types.

If you post pictures of anything you need clarifying it will be easy to do.
 

Mee

Pedelecer
Aug 13, 2025
26
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We only ask for a location as it may help in an offer from a forum member to look at your battery, to see if it is recoverable/repairable.
Also this a legit premier UK EAPC forum and not some dodge pot site like fakebook that gives out duff info, if someone does they soon get called out by other members.
No one has asked for a location, but I have been accused of being untrustworthy because I haven't told everybody and his dog where I live.

I don't know who anyone is on this site and any issues with giving location are not about trusted advice. People are discussing all sorts of details on here that could put them at risk in many ways.

I didn't buy a used battery, I bought a used Trike advertised as charger lost, when I set off I didn't know the situation was going to be dodgy that unfolded as it went. . have no car, I went by bus, I was told he wold give me his address, when I got to the station, then when he left work, he then said he was working late and told me to wait at the coop, I waited at least 3/4 in the blazing sun. he brought the trike there , wouldn't not give me an address, said he didn't want anyone hanging around outside of his house. I bought the trike and asked if it was stolen before I gave him the money and he said no. I asked for the keys and was told they were lost also. I was also told it was fully charged and working as it should, which also were not true. The police checked the reports and serial number and that's as much as I know, I also called Jorvik to track the serial number to a buyer but they originally said they could then they said they cant , then maybe and they will get back to me but still haven yet. They also said if I prove it's not stolen they can supply replacement keys but when I asked about this they siad it would take months as they would have to be made. I have done all I can to verify it is not stolen and as much as I can do because the seller refused to collect it and give me a refund, and then blocked me and I can force him to speak to me can I.

So now I have a trike the barely works, no money to fix it other than what I spend on credit card, I have done my due diligence in trying to remedy the situation and check that it is not stolen but somehow I am being accused of wrongdoing, by a stranger on a forum who knows nothing about me, and who feels he needs to know where I live in order to deem if I am handling stolen goods or not, which I am not. And if the police did find it was stolen they would no doubt come and take it from me, because they do know where I live, even though they weren't all that interested in helping me. Maybe I could sue the police in that circumstance?
 

Mee

Pedelecer
Aug 13, 2025
26
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All I can say is that the bottom part of some battery mounts has a cavity which is large enough for the smaller controllers.

Putting the controller there is neat and tidy. But I don't have specific Jorvik knowledge.

When you say 'bar mounted', I think you might be confusing two different things. The 'controller' is usually an aluminium case with lots of cables going in and out.

The thing on the handlebars with switches and indicators of power and battery state and speed is NOT the controller: it is generally called the 'display', or LCD or LED for some types.

If you post pictures of anything you need clarifying it will be easy to do.
Sorry, I mean the battery bar. the mount for the battery is, where Jorvik state the controller is. If I buy a compatible will the battery mount also have a controller that if I match the system will work with my trike?

So what I am unsure of is, if I buy a compatible and replace the battery mount, even though I match the system, will I then have no controller?