How to charge my panterra transport scooter,do i leave switch on or off and for how long?

Tony you can charge it either way with switch on or off and if you have used the scooter alot during the day and the battery level lights are in the red charge overnight. The charger light will turn from yellow to green when the batteries are fully charged It really is a good idea to get into the habit of charging overnight wehn you have used the scooter all day. It helps the batteries to recycle them thru a charge cycle when they run down. Now if the scooter is used rarely then make sure it is fully charged when it stored and charge once a week when idle. Hope this helps you