E300 , replaced both batteries , now charger light stays green although just plugged in to new batteries for first time. What is it now ?

Question edited for clarity, full make model (what it is).

Did you follow Section 9 about fully charging the battery, pressing and holding the button?

Charging Instructions 1. Plug the charger into the mains - the charger indicator light will be green.
2. Turn on the battery by press and holding the power button until the green light is illuminated.
3. Plug the battery into the charger. The charger light will turn from green to red to indicate the charging process has started.
4. Once the battery is fully charged, the charger status light will be

https://www.powakaddy.com/wp-content/uploads/2021/02/LATE-2022-FX3-OWNERS-MANUAL_01b.pdf

If that doesn't fix it, it will be a warranty issue. Click Support on top left.

https://www.powakaddy.com/manuals-and-instructions/

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The green light will come on if the charger does not sense a low battery. In other words, if you plug it into the wall, and not the scooter, it will still show the green light. It will only show a low charge (and charge the battery) if it is completely connected completing the circuit. My guess is that the battery is dead, and the plug is not all the way connected. Also, I believe the scooter has to be turned off to charge.

When the charger light stays green when you plug it in it means the charger is not actually charging. Either the batteries are bad and will not take a charge anymore or the charger is not operating correctly. It sounds more like a battery issue. The battery voltage needs to be measured on each battery with a volt meter. If the voltage is less than 10 volts on either battery they both will need to be replaced.

CHANGE CABLES TO BATTERY

My guess is the batteries have gone bad. They only last about a year before they need to be replaced. You can buy them fairly cheap off of Ebay.

remember new batteries take 12 hrs to charge....

Well this post was done a long time ago, seems like you have a bad battery. you should see 24vdc. The batteries are in parallel so it adds up to 24 volts.If one of them is dead it would only show 12vdc.

I have this same problem? What do you do? I bought a new charger thinking it was that and the light stays green on it too.

Dust getting in the charger is a problem, Try blowing it out with a moisture-free dust remover, found at most any store. Green flashing means improper power, due to dust or power from the outlet, try a differant wall outlet. Red flashing means the charger or battery is to hot and must cool down before it will charge. The charger will not charge a battery if the lights are flashing. Solid Red light means it is charging and solid green light means it is charged. Plug the charger in first before putting the battery on the charger. If the charger has been droped or hit the floor the coil inside could have broke loose and dammaged the charger requiring it to be replaced.