Will not sometimes more often will not go than will

Is the charger getting power? Is the power reaching the battery pack to charge them? If you answer yes to both questions then something has to be wrong with the battery pack.

Did someone qualified tell you that you needed new batteries?. I would go back to the battery supplier & go from there.ALSO,if you still have the old ones can they be tested too.Ask them,i hope this helped.Colin

You must charge each battery individually with an automotive NON automatic style battery charger until each battery has at least 10 bolts each. The scooter charger cannot pull up a battery with less than 10 volts.

If the scooter in question is a Pride Victory with on board charger ? ( you plug a mains lead into it ?) now what happens with this particular scooter as the charger starts to fail, it's not charging the battery correctly, if you have access to a multimeter DC setting , check the voltage from one of terminal of the battery to the other terminal of the opposite battery, now it should read at least 18 volts , 0 volts then you need to change from one terminal to the other and same for the other battery ,, now if it below 24v that's the problem because as soon as you put it under load the voltage drops to under the minimum working voltage for the controller , hope that makes sense so other-words you need to replace the on board charger , contact me and I show you a way to do this cheaply...

Regards
www.gewizrepairs.co.uk?fixya

make sure battery cables are secure at battery terminals and clean.how old are the batteries.If the batteries run down fast they are no good.a good way to test them is put scooter against some thing solid and go forward.If the battery indicator drops to o the batteries are no good.It takes about 10 hours to charge the batteries

Is there a power switch on the charger? Is charger connected to the battery? Are the batteries fully charged?

check the freewheel lever on th rear of the chair near the right rear wheel if you can push the scooter easily then you are in freewheel locate the lever and move it to the drive mode and try to drive the scooter again if it still won't move then you have other problems that can only be checked by a service tech Hope this helps

Check that it is unplugged from the charger. Then check the freewheel lever to ensure it is in gear by placing it out of gear first, then placing it firmly in gear. Do this while the key is OFF. Wait three seconds, then turn back on and it should go.

If it doesn't, and you are sure it's in gear and unplugged from the charger, you should be getting a fault code flashing on the charger display. Consult your owners manual to determine the fault and proceed as recommended.

Here's a link to the owners manual if you've lost yours. Good luck.

http://www.pridemobility.com/pdf/Owners_Manuals/US_Scooter/US_Victory_om.pdf

Have the batteries tested with a load tester. Usually when it starts to move slow it means the batteries are going.