Raleigh tekoa ie battery upgrade

[yzf450motoxrider]

I picked up a Raleigh tekoa ie. The battery is in bad condition only charges to about 60% and gives a range of 9 miles on max assist. Is it possible to remove the original battery and cradle and replace them with a 48V 17.5AH pack https://www.amazon.com/gp/product/B07Y83JT3S/ref=ask_ql_qh_dp_hza . Is it as simple as connecting the positive and negative wires or will the controller have issues due to the non OEM battery? Thanks

 

[E-HP]

Are there only two wires? If so, there shouldn't be an issue.

 

[yzf450motoxrider]

It has four wires. The standard Red and black and then two additional wires. I'm assuming the additional wires are for range/ battery monitoring on the ebike display.

 

[E-HP]

It has four wires. The standard Red and black and then two additional wires. I'm assuming the additional wires are for range/ battery monitoring on the ebike display.

Try temporarily disconnecting the other two wires and see if the bike runs.

 

[yzf450motoxrider]

Okay, so I tested this. I blocked off the two terminals used for battery monitoring and installed the battery. Turned the battery on then the ebike display. It begins the 8 sec count then shuts down. It doesn't seem to be the bike controller causing the shut down. I think the battery isn't detecting any input from the bike controller and then shutting down.

 

[E-HP]

Okay, so I tested this. I blocked off the two terminals used for battery monitoring and installed the battery. Turned the battery on then the ebike display. It begins the 8 sec count then shuts down. It doesn't seem to be the bike controller causing the shut down. I think the battery isn't detecting any input from the bike controller and then shutting down.

You should be able to verify that by checking the voltage on the battery leads when it "shuts down".

 

[yzf450motoxrider]

Did some more testing.

Battery terminals not connected to bike (battery off)
40V

Battery terminals not connected to bike (battery on)
53V only stays on for about 10sec if not connected to bike

Battery connected to bike (battery off)
2V in the leads

Battery connected to bike (Battery on additional leads not blocked)
53V This voltage is maintained when the two additional leads are not blocked.

Battery connected to bike (Battery on additional leads blocked)
53V for 10 sec then drops to 2V. Seems like the battery is turning off bc no feedback from the bike controller

 

[Balmorhea]

Seems like the battery is turning off bc no feedback from the bike controller

That’s true. But the kind of weaselly bastards who would do that to the battery, might also have done it to the controller. You can’t know unless you test the bike on a battery that doesn’t communicate with it.

 

[E-HP]

Battery connected to bike (Battery on additional leads not blocked)
53V This voltage is maintained when the two additional leads are not blocked.

Is there a way to measure the voltage on the additional leads in this state? If you can trick the battery to stay on, then if the bike still shuts down, you'll know whether a normal battery could/would work. The controller is either sending a signal to the battery, or shorting the additional leads to keep the battery on. If the latter, you could manually short them so the battery acts like a normal 2 lead battery.