Battery not functioning fully

[Davekll]

Hi Harrys looks like I owe you an apology I have now tried the meter at 200 volts with the battery switched on and got a reading of 41.8 volts, I also tried it again at 600 volts and got a reading of 41 volts, and at a lower voltage of 200m, 2 volts & 20 volts the reading stayed at 1 like you said it would, so I think now the battery must be ok and the problem is somewhere else maybe the controller or the display because like I have said I can get over 20 miles without it packing in. So I need to investigate further. A couple of weeks ago I purchased the multimeter and decided to ask the question on this forum what the problem might be, I am glad that I did it that way round because I was ready to buy a battery and it could have been a costly mistake.
Dave.

 

[Gionnirocket]

It's the small details Norton

 

[Davekll]

It's the small details Norton

Hi Gionnirocket, you were also on the right track but I am a novice at this sort of thing but hopefully I have learned something and the battery is functioning correctly. Thanks for taking an interest and helping out with your input
Dave.

 

[Gionnirocket]

Hi Gionnirocket, you were also on the right track but I am a novice at this sort of thing but hopefully I have learned something and the battery is functioning correctly. Thanks for taking an interest and helping out with your input
Dave.

We all learn by doing
Glad it worked out and you're back rolliń

 

[Djson]

Hello all

Does anyone know!

I am getting a trike this week, hopefully.

I have an ebike which is a year old.

Both are 36v systems.

I want to use my ebike battery as a 2nd / backup for the trike.

I have taken the ebike battery out and it is showing 42v (which we know is a fully charged battery)

So what I think I need to do,

Is wire my 2nd battery into the same wires as the trike battery (so before the controller)

Then all will be good?

Thanks

 

[tomjasz]

Yes.

 

[Gionnirocket]

Hello all

Does anyone know!

I am getting a trike this week, hopefully.

I have an ebike which is a year old.

Both are 36v systems.

I want to use my ebike battery as a 2nd / backup for the trike.

I have taken the ebike battery out and it is showing 42v (which we know is a fully charged battery)

So what I think I need to do,

Is wire my 2nd battery into the same wires as the trike battery (so before the controller)

Then all will be good?

Thanks

But don't plug them in and run them at the same time as their voltages need to be equal in order to do so and that requires additional hardware and precautions.
Use one, then the other. Easiest and safest way to do so is have the same plug on both batteries and only one plug on the motor. If you want to get fancy you can wire in a selector switch.

 

[Djson]

But don't plug them in and run them at the same time as their voltages need to be equal in order to do so and that requires additional hardware and precautions.
Use one, then the other. Easiest and safest way to do so is have the same plug on both batteries and only one plug on the motor. If you want to get fancy you can wire in a selector switch.

Well that is my next question, are the motors all wired up the same way?

Probably not. That would be simply if the plugs on both motors were the same.

I guess they are actually made differently.

 

[tomjasz]

But don't plug them in and run them at the same time

I suggested that and was informed by the OP that he wasn't stupid.

Well that is my next question, are the motors all wired up the same way?

Probably not. That would be simply if the plugs on both motors were the same.

Connectors may be different just replace and match. There are two wires Pos and Neg. I'm certain your motors are using the same two wires.