[Halle]

My charger is indicating abnormal cycle, it starts up and runs for the normal time required to recharge, do you know what might be causing this?

[Frank7]

It sounds by your description that you have an electric Yamaha. The light that signals abnormal cycle is indicating that the charger did not get the batteries to the correct voltage that would allow the charger to complete a full charge cycle and shut off. This condition is typically caused by one or more week batteries. It also could be caused by a short in the system and finally the charger could need repair. Further testing of the system is required to isolate the problem.