Razor mx 650 wont hold charge

SOURCE: e-100 razor scooter battery will not take charge

its dead they need to be recharged every time they have been used

SOURCE: On an E 100 Razor scooter, the battery charger shows charged

We had the same problem that I found to have a very simple fix. It seems all that needed to be done was hold in the reset button a few seconds while the battery charger was plugged in and the light on the charger turned to red and the battery charged again. Seems like too easy of a fix but it worked for my kids scooter.

SOURCE: My sons razor e200 dies quickly. I have changed

Problem is not the batteries then. Replace the controller. The controller could be resisting some of the charging current to the battery.

But first try this:

Charger the scooter with it OFF

Directly connect the charger to the battery

If still the same problem then:

Directly connect the charger to the battery then,
connect the motor leads directly to the battery and see how long it runs. It with new the batteries it should run longer than a minute. If it does than something is definitively wrong with the controller.

SOURCE: Hi there,My girls Razor E300 is a year old wont fully charge...

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.