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I have an electric scooter/bike from When I received it, nothing worked on it accept the alarm system. The battery wasn't charging, and I was told that the polarity are in reverse. I took it to a fellow who sells a similar model which he took a power cord and did some rewiring and used his external power supply and plugged it into my bike. Everything worked on it. However, he didn't want to work on my bike. So, I come to the experts, you! How do I go about reversing the polarity in the batteries? Now, he said that the batteries are dead, but if the polarity needs to be changed, how could he have gotten a good reading? (by the way, he was constantly negative about my bike)

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My Gio 500 was fine 4 3 months when it began to work on and off. When it didnt run anymore it was the rear wheel that did not turn smoothly. When I manually rotate the wheel it turns like it is jammed up.

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Dear Citiboyblu,
Yes.... if the battery has gone flat and then charged with the positive and negative leads reversed, it will adopt a reverse charge.

There's a theory that if you flatten a lead/acid battery then reverse charge it then flatten it again and charge it correctly. Some of the lead sulphate that contaminates the plates will be dissolved back into sulphuric acid and increase the performance/lifetime of the battery.

Never tried, so don't know if the theory works.

You can also visit to the following link for more explanation.....

Posted on May 13, 2010


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