Razor will not take a charge, will only function when plugged in.

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.

A green light means the battery is charged.

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

put a battery charger for a car on the + and - leads and this will recharge it if you do not have the correct power pack recharge transformer

Simply follow the instructions and charge for a full 4 hours the first time. On subsequent charges, unplug when the light blinks after about 1 hour

The 3805 has only a green charging indicator. This light will illuminate solidly when plugged in. Charging takes a full 8 hours. There is no indicator to tell you when to recharge. If the batteries are in good condition, you should be able to use the shaver for 7-10 days on a full charge

I don't know how to solve your problem but, the three lights mean this:
Red LED light indicates the battery is being charged
Green LED light indicates that the battery is fully charged
Amber LED light incidates that the battery power level is low - the battery needs recharge.
Do not recharge you battery over 24 hours.

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.

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.

the steady red light showing when in charger shows that
it is charging. the blinking red light when taken out of
charger or turned on and off means it is not fully charged.
leave it in charger till red light turns green.