I have a 4 years 48 volts (4 batteries of acid / lead of 12 volts each, I don't know the amperage) Gio electric scooter.
Since few months, my batteries full charged (53 to 56 volts: 3 full blocks on the screen), I can only make 14 kilometres instead of the usual 50 to 70 kilometres. It's like there's almost no current left. However, the voltage of my batteries is 46 volts (two blocks on the screen) and the lights, the turn signals, the horn and the screen light work.
I proceed several test and all the results are like this:
fully charged : 51.38 v (that's now the full charge level: I don't know if this is normal)
motor running 20 sec : 50.00 v
after motor is stopped the voltage comes back slowly to 51.28 v.
Is the next step to test the controller or so? If yes do you have an how to do guide?
How do I find the problem myself? I have a multi-meter.
I don't understand your writing but, I really appreciate you took the time to answer.
Since the scooter still runs with the old batteries then it is a running scooter and should command the price of a running scooter with worn out but still working batteries. Most electric scooters are not sold with brand new batteries that are under warranty so if someone buys the scooter and has to replace the batteries with new ones then they will have an electric scooter that is in much better than average condition.
I do not know what the going price of Gio electric scooters is in your area however for example lets say they are going for $400 with good used batteries, then the price of one with brand new batteries that are under warranty should be around $500. So the price of a working scooter that needs $300 of new batteries should be around $200.