The battery wont stay charged .when you plug it in to charge the green light comes on ,when fully charged the red light is on,when you turn it on no power

When the red light turns off and only the green light is on that indicates that the battery pack is charged and the vehicle is ready to use. If the charger light stays green and there is no red light when the charger is plugged into the vehicle and into the wall this could be caused by many things.
https://support.electricscooterparts.com/support/solutions/articles/1000104443-charger-light-stays-green-when-charging

First measure the voltage of the batteries at the charging socket of the joystick.

Hi.

The little red light means your battery requires charging.

Plug in the charger and allow it to charge.
It should change colour to orange when it has over 15% charge in it and then turns green when it is 90% charged.

If it still stays red dispite being fully charged. Try removing the battery for a few seconds and then replace it again.

I hope this helps.
If your phone is fully charged and it still has a red light, then take it back to the shop you acquired it and get a replacement.
It means you have a hardware fault.

The red light will turn blue when the battery fully charges - it is flashing because the battery is charging.

This is not right. They should last much longer then that. I have one of the more expensive 18V lithium batteries (the one with the button on it that tells you if it needs charging or not) and I can use mine almost all day before it needs to be recharged. I do construction work and I use my Ryobi products almost all day. Either both batteries are bad (I don't believe that is the case) or the charger is not charging them all the way to a full charge. With this charger, you do need to make sure that you remove the batteries as soon as the green light comes on. It is not good on these batteries to stay charging after they are fully charged. You also should not leave the charger plugged in without any batteries charging.Please tell me more about the charger. When you plug in the charger, does the red light come on? When you plug in a battery, does the red light stay bright and the green light blink? Does the red light go off and the green light stay on bright when you remove it from the charger?
If the charger is not working correctly, then return it for a new one.

According to the manual, the red light comes on while charging when the battery does not yet have enough charge to sustain a 3-5 minute shave. The green light stays on steady while the razor is charging, and blinks when it is fully charged. If your battery life is short, they might need to be changed.

Hmmm...is the USB cable plugged in to a powered PC? Could be cable or battery issue. Red light means that the battery is very low on juice. Return it to where you got it from if you can't solve it on your own.
you want a repair service

When batteries are placed into the charge mode, the red light will come on.
When fully charged, on those units with a green light, the green light will be an indication that your batteries are charged and if your unit has no green light, the fully charged indication will be when the red light turns iff.

Wait, how long have you waited for it to charge? It's supposed to stay red until over 80% charge, then switch to yellow. When it is fully charged, it goes to green. When you mean it stays red when plugged in, have you waited the 2 hours?