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Hi i have recently bought a second hand electric bike and there is a problem when i pull back the throttle the motor looses all power and stops i can gain speed slowly by accelerating slowly but soon as i go past half way on the accelarater the motor will lose all power again could you tell me please what you think is the problem is thanks!!!!1

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My bike had the same problem... It was the battery. I have a new battery now and it works perfectly.

Posted on Apr 21, 2010

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Hi It could be voltage drop and than the voltage drop protection circuit in the controller cut the power off. Your battery could be faulty. It could be just one cell faulty and it will affect all battery in some cases it is possible to replace faulty cell... if the battery lost its capacity because is old you need to replace it.
Regards Mark
Volto electric bicycle NZ
Electric bicycles distribution

Posted on Dec 08, 2012


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