I have taken a 10 year old electric bike out of the garage a few weeks ago after not having used it for multiple years. The bike is an elops 7 bought at decathlon with a geonaute battery. It still looks very good and the mechanical parts seem to be working flawlessly (I still plan to take it to a checkout in the upcomings weeks). However I'm having some issues with the electrical parts:
- When the motor is asking for too much power (when starting or when going up a hill), the control screen and the motor both go off. They can be turned on again but it takes some time and is not a viable solution. When the power needed is low, the motor functions perfectly.
- The battery seems to lose its power quite quickly, sometimes it's at 3 bars out of 5, and it just goes completeley out of power.
I would like your opinion on the diagnostic and the solution to get it in better shape(and what I've tried so far).
It seems to me that there is a problem in the battery (which makes sense because it is old), when talking to a salesman, he said it was very probable for a battery this old.
To fix that I would like to change the battery, Decathlon told me the part is not made anymore and that they can't do anything for me. I couldn't find the model on geonaute's website either. The battery is 24V and 10Ah. Upon some research, a battery of this type seems to be around 100-150 euros but wouldn't have the right connectors. Some website also propose battery reconditioning but the price is around 300 euros and it seems very expensive.
Any idea is welcome and feel free to ask for more specific details.